Advertize or Advertise: The Spelling Mistake to Avoid in 2026

Advertise is the standard spelling in both American and British English, while “advertize” is a rare, largely archaic variant with a “z” instead of an “s.”

Unlike many other US-UK spelling splits (like “organize” vs “organise”), both English varieties agree on “advertise” with an “s.”

“Advertize” does appear occasionally, mostly in older British texts, but it’s generally considered outdated or nonstandard today.

In this guide, you’ll learn why “advertise” is the correct spelling almost everywhere, and where the rarer “advertize” variant comes from.

Table of Contents

Advertize or Advertise: Quick Answer

Which spelling is correct?

✅ Advertise Standard and widely preferred
⚠️ Advertize Alternative/variant spelling

Examples:

We need to advertise our new product.
The company wants to advertise its services online.
They advertised the job on their website.
She works in advertising.

Oxford lists advertise as the standard verb and gives examples involving advertising products, services, jobs, and events.

Collins also lists advertize as a variant of advertise, meaning that the spelling exists, but it is not the usual form you should choose for general modern writing.

Advertise vs Advertize: Meaning

Both advertise and advertize refer to the same basic idea: making a product, service, event, job, or other information known to the public.

The standard word advertise can mean to promote something publicly or announce that something is available. Oxford gives examples such as advertising a product, service, job, or event.

Advertise as a verb

Advertise means:

To promote a product
To promote a service
To announce an event
To publicize a job
To make something publicly known

Examples

The company will advertise its new product online.

They are advertising for a new manager.

We need to advertise the event before Friday.

She advertised her business on social media.

The Origin of Advertise

The word advertise has a long history.

Oxford traces the word to Late Middle English, from Old French advertiss- and ultimately Latin advertere, meaning “turn towards.” The original idea was connected with turning someone’s attention toward something.

Over time, the meaning developed into the modern sense of bringing something to public attention, particularly a product, service, job, or event.

This history also helps explain why the spelling can look unusual compared with words that use the -ize ending.

Why Do People Write Advertize?

The spelling advertize is not simply a random misspelling.

Major dictionaries recognize it as a variant spelling. Collins lists advertize as an alternative form of advertise.

This means that seeing advertize does not necessarily mean the writer does not know English spelling. It is a recognized variant.

However, advertise is the much safer choice for modern general-purpose writing because it is the standard form used by major English dictionaries such as Oxford.

British vs American English

Unlike some spelling differences such as colour/color or centre/center, the distinction between advertise and advertize is not a straightforward British-versus-American spelling rule.

The standard form in both varieties is:

advertise

Collins lists advertize as a less common variant and notes it in connection with American English as well.

English Variety	Standard Form	Variant
British English	advertise	advertize
American English	advertise	advertize
International English	advertise	advertize

Important point

Do not assume that advertize = American English and advertise = British English.

That would be an oversimplification.

Advertise is the standard spelling across both major varieties of English.

Advertise or Advertize in Formal Writing

For formal writing, advertise is the recommended choice.

Use advertise in:

Academic writing
Business documents
Websites
Blog posts
News articles
Professional emails
Resumes
Job descriptions
Marketing content
Educational materials

Example

Preferred:

Companies often advertise their products through social media.

Less common variant:

Companies often advertize their products through social media.

The first version is the conventional modern spelling.

Advertise or Advertize for SEO?

If you are creating online content, use advertise as your normal spelling.

Search engines can generally understand spelling variations and related forms, but that does not mean you should replace the standard spelling with a less common variant.

For a grammar article targeting the keyword advertize or advertise, you can naturally mention both forms while using advertise in your main content.

Advertise or Advertize: Common Mistakes

1. Thinking Advertize Is Always Wrong

Calling advertize an invented word would be inaccurate.

It is recognized as a variant in dictionaries such as Collins.

However, that does not make it the preferred spelling for everyday modern writing.

2. Assuming Advertize Is the American Spelling

English spelling differences between Britain and America can make this seem logical, but advertise is used in both varieties.

Collins lists advertise as the main form and notes advertize as a variant.

3. Writing Advertize in Professional Content

Although the variant exists, advertise is the safer choice for professional communication.

For example:

❌ We will advertize our new service.

✅ We will advertise our new service.

4. Confusing Advertise With Advertisement

These words are related but have different grammatical roles.

Advertise = verb

We will advertise the product.

Advertisement = noun

We created an advertisement for the product.

Oxford defines advertisement as a notice, picture, or film used to tell people about a product, job, or service.

Advertise vs Advertisement vs Advertising

Understanding the related forms makes the spelling easier to remember.

Word	Part of Speech	Example
Advertise	Verb	We advertise online.
Advertised	Past tense	They advertised the product.
Advertising	Noun/participle	Online advertising is popular.
Advertisement	Noun	I saw an advertisement.
Advertiser	Noun	The advertiser launched a campaign.

Oxford recognizes advertising as the activity or industry of promoting products and services.

Everyday Examples of Advertise

Here are some natural examples showing how advertise is used.

Example 1: Business

Small businesses often advertise their services online.

Example 2: Product

The company plans to advertise its new phone.

Example 3: Job

The company is advertising for a new sales manager.

Example 4: Event

We need to advertise the concert more widely.

Example 5: Social Media

Many brands advertise their products on social media.

Example 6: Property

The house was advertised for sale.

Oxford provides similar uses involving products, jobs, events, and public notices.

When to Use Advertize

There are situations where you may encounter advertize, especially in older material, particular dictionaries, or writing that intentionally follows the variant.

For example:

The company chose to advertize its services locally.

The spelling is understandable and recognized as a variant, but it is not the form most readers expect in contemporary standard English.

If you are not following a specific house style or historical spelling system, advertise is the better choice.

Advertize or Advertise: Which One Should You Use?

For most readers, the answer is simple:

Use advertise.

It is the standard spelling and the form listed as the main entry in major learner dictionaries.

Use advertize only when you have a specific reason to reproduce that variant, such as quoting an original source or following a particular established spelling style.

Quick rule

When in doubt, choose ADVERTISE.

Google Trends & Modern Usage

The spelling advertise is the dominant modern form in general English.

The variant advertize continues to appear, but it is considerably less familiar to most contemporary readers.

This difference matters when writing for:

Search engines
General audiences
Students
ESL learners
Professional readers
Business websites

Modern dictionaries continue to present advertise as the primary form, while recognizing advertize as an alternative.

For content creators, the practical takeaway is straightforward: use advertise as your default spelling.

Quick Comparison Table

Feature	Advertise	Advertize
Standard modern spelling	✅ Yes	⚠️ Variant
Meaning	Promote/make known	Same
British English	✅ Standard	Variant
American English	✅ Standard	Variant
Formal writing	✅ Recommended	Less common
Common in dictionaries	✅ Main entry	Recognized variant
Recommended for learners	✅ Yes	No

Key Takeaways

Advertise is the standard modern spelling.
Advertize is a recognized variant spelling.
Both forms have the same basic meaning.
Advertise is used in both British and American English.
Do not assume advertize is exclusively American English.
Use advertise in professional, academic and business.
Advertisement is the related noun.
Advertising refers to the activity or industry.
When unsure, choose advertise.

FAQs About Advertize or Advertise

Is advertise or advertize correct?

Advertise is the standard spelling. Advertize is a recognized alternative spelling, but it is much less common. Major dictionaries such as Oxford use advertise as the main form, while Collins lists advertize as a variant.

Is advertize a misspelling?

Not exactly. Advertize is recognized as a variant spelling by dictionaries. However, it is less common than advertise, so using advertise is generally the better choice in modern standard English.

Is advertise British or American English?

Advertise is standard in both British and American English. It should not be treated as an exclusively British spelling.

Is advertize American English?

Advertize has been used in American English, and dictionaries recognize it as a variant. However, advertise remains the standard form used in modern American English dictionaries.

Should I use advertise in formal writing?

Yes. Advertise is the recommended form for formal writing, business communication, academic work, websites, and professional content.

What is the noun of advertise?

The most common related noun is advertisement. For example: “The company created an advertisement for its new product.” Oxford lists advertisement as the noun referring to a notice or communication promoting something.

What is the difference between advertise and advertising?

Advertise is a verb, while advertising is generally used as a noun for the activity of promoting products or services. For example, “Companies advertise online” and “Online advertising is growing.”

Why do people spell advertise as advertize?

The pronunciation of the word and the use of -ize spellings in English can make advertize seem natural. It is also a recognized historical/variant spelling. Nevertheless, advertise is the conventional modern form.

Conclusion

When deciding between advertize or advertise, the safest and most widely accepted answer is advertise.

Advertise is the standard spelling used in modern British and American English. It means to promote a product, service, event, job, or other information publicly. Oxford lists advertise as the standard verb, while Collins recognizes advertize as a variant.

The spelling advertize is therefore not simply meaningless, but it is much less common. For websites, professional communication, academic writing, and general English, advertise is the better choice.

So, if you need one spelling to remember:

Advertise = standard and recommended
Advertize = recognized but uncommon variant

Maya Bennett

I’m an English grammar writer specializing in word usage, spelling, grammar rules, and commonly confused words. I create simple, practical content to help readers understand English better and write with confidence.