trade mark (trademark)

Trademark is a closed compound: write it as one word in modern English. Below are short rules, clear examples you can copy, quick rewrite patterns for work or school, memory tricks, and a final checklist to fix instances fast.

Quick answer

"Trademark" is one word. Avoid "trade mark" or "trade-mark" in contemporary writing.

Use trademark as a noun or adjective: trademark filing, trademark owner, the trademarked logo.
Capitalize only when required: use Title Case or a brand's official styling when quoting a proper name.
Plural and possessive: trademarks; singular possessive: trademark's; plural possessive: trademarks'.

Core explanation: spacing and hyphenation

Many compounds start as two words, move to a hyphenated form, and finally become a closed compound. Trademark followed that path historically, but today the single-word form is standard in both American and British usage outside of some older legal texts.

Hyphenation

Trade-mark with a hyphen is largely archaic. Use it only when reproducing historical sources or a brand that deliberately uses the hyphen.

Spacing

Writing "trade mark" (two words) looks like a spacing error. Modern dictionaries and most style guides prefer the closed form "trademark."

Why writers split the word

Writers split trademark because they hear two parts-trade and mark-and guess the spacing. Fast typing, unfamiliar legal phrasing, or copying older text can also spread the variant.

Sound-based guessing: you hear two words and write two words.
Familiarity gaps: unsure of the established written form.
Editorial oversight: quick drafts or bulk edits without checking style.

How it looks in real usage

Seeing the correct form in context helps it stick. Below are pairs you can copy - replace the wrong form and keep the rest of the sentence intact when possible.

Wrong: The company filed a trade mark this morning.
Right: The company filed a trademark this morning.
Wrong: We should register the trade mark before launching.
Right: We should register the trademark before launching.
Wrong: The trade mark's owner contacted us.
Right: The trademark's owner contacted us.
Wrong: Is that trade mark still valid?
Right: Is that trademark still valid?
Wrong: They hired a lawyer for trade-mark disputes.
Right: They hired a lawyer for trademark disputes.
Wrong: The trade mark application was rejected.
Right: The trademark application was rejected.

Examples by context

Use these ready-made swaps depending on tone and audience.

Work:
Wrong: The migration needs a trade mark check before release.
Right: The migration needs a trademark check before release.
Work:
Wrong: Update the trade mark spreadsheet.
Right: Update the trademark spreadsheet.
Work:
Wrong: Coordinate with the trade mark team.
Right: Coordinate with the trademark team.
School:
Wrong: The essay cites the trade mark case.
Right: The essay cites the trademark case.
School:
Wrong: Discuss trade-mark law in class.
Right: Discuss trademark law in class.
School:
Wrong: The project uses an old trade mark example.
Right: The project uses an old trademark example.
Casual:
Wrong: That logo is a trade mark, right?
Right: That logo is a trademark, right?
Casual:
Wrong: Don't copy the trade mark.
Right: Don't copy the trademark.
Casual:
Wrong: Is this a trade-marked name?
Right: Is this a trademarked name?

How to fix your own sentence

Repairing the error often means more than swapping words. Check tone, agreement, and punctuation after you replace "trade mark" with "trademark."

Step 1: Read the full sentence to confirm the intended meaning.
Step 2: Replace "trade mark" or "trade-mark" with "trademark."
Step 3: Reread for flow and adjust surrounding words if needed.

Rewrite example 1: Original: This plan is trade mark if everyone stays late.
Rewrite: This plan is sound if everyone stays late. (Sometimes a clearer rewrite is better than a literal swap.)
Rewrite example 2: Original: The assignment feels trade mark now.
Rewrite: The assignment feels finalized now.
Rewrite example 3: Original: Is that trade mark this afternoon?
Rewrite: Is that meeting this afternoon?

A simple memory trick

Picture trademark as one single unit tied to a brand or logo. If you mentally group the two parts into one idea-trade+mark = trademark-the closed form becomes easier to remember.

Visualize the word as a single block: trademark.
Scan your drafts for "trade mark" and replace in bulk.
Prefer the dictionary or style-guide form over how it sounds.

Similar mistakes to watch for

Spacing and hyphenation errors often cluster. When you find one, scan nearby text for other split or hyphenated compounds.

book store → bookstore
sun flower → sunflower
trade-mark → trademark
e mail → email
data base → database

FAQ

Is "trade mark" ever correct?

Rarely. You may see "trade mark" or "Trade Marks" in older sources or specific historical legal titles. For modern general writing, use "trademark" unless reproducing an exact historical or legal phrase.

Should I ever use "trade-mark" with a hyphen?

No, not in contemporary usage. Use "trade-mark" only when quoting an older source or a brand that intentionally uses the hyphen.

Do British and American English differ on this?

Both varieties now favor "trademark" in normal usage. Older British legal documents sometimes use "Trade Marks," but everyday and contemporary legal writing typically uses the single word.

How do I form plurals and possessives?

Plural: trademarks. Singular possessive: trademark's. Plural possessive: trademarks'.

What about the verb or adjective forms?

Use trademarked for the adjective/participle (the trademarked logo) and trademarking for the verb (they are trademarking the name).

Quick check before you publish

Run a quick replace for "trade mark" and "trade-mark" to "trademark," then scan for capitalization and clarity. Keep a short list of common rewrites from this page to speed future edits.

If you want an automated check, paste one or two sentences into a spelling or grammar tool that flags spacing and hyphenation errors.