"Confusingly similar" is the phrase that decides most trademark disputes, and it's broader than people expect. Two marks don't have to be identical to be confusingly similar; they have to be close enough in sound, appearance, or meaning, in a related line of goods, that an ordinary customer might mix them up. That's why McSweet can draw a challenge in food, and why a distinct spelling saves no one on its own.
This checker screens your brand name for exactly those dimensions against the live USPTO register. It matches by sound and meaning (not just spelling), scores the conflict risk 0–100, and shows the specific marks and how close each one sits on each dimension. It's the analysis a chatbot can't do (no live register, invented marks) and that incumbents bury behind a paywall. Read it as a preliminary screening signal, not legal advice.
The dimensions that make two marks "confusingly similar"
Sound: do they sound alike said out loud? (Celore / Sealore)
Appearance: do they look alike on a shelf or a screen? (modern / modem)
Meaning: do they convey the same idea, even in different words or languages? (Blue Sky / Cielo Azul)
Relatedness of goods: the closer the categories, the less similarity it takes to confuse.
No single dimension is decisive; examiners weigh them together. The tool surfaces each one so you can see why a given mark scored the way it did, rather than getting a bare number.
Why distinct spelling doesn't save you
The most common founder mistake is assuming a creative respelling makes a name legally distinct. It rarely does, because sound and meaning survive the respelling. Screening for confusing similarity means testing past the spelling to the impression the name actually leaves, which is what this tool does.
Frequently asked questions
Is "confusingly similar" the same as "likelihood of confusion"?
Closely related. Confusing similarity is the mark-comparison piece; likelihood of confusion is the wider multi-factor test that includes it.
The tool flagged a similar mark. Does that mean I'll be refused?
No. It's a signal that a mark is worth reviewing, not a prediction of any outcome. A serious name warrants a professional clearance search.
Screen your name now
Check it against millions of live U.S. trademarks by sound, spelling, and meaning. Free, no account.