Which to use
“ulcer” and “user” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #28,066
- “ulcer” frequency rank
- #2,095
- “user” frequency rank
- 30161
- confusion score
Side-by-Side Comparison
| Feature | ulcer | user |
|---|---|---|
| Definition | An open sore of the skin, eyes or mucous membrane, often caused by an initial abrasion and generally maintained by an inflammation and/or an infection. | One who uses or makes use of something, a consumer or client or an express or implied licensee (free user) or a trespasser. |
Where the eye mixes ulcer and user
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: ulcer vs user
A purely visual mix-up. ulcer (/ˈʌlsə/) and user (/ˈjuːzə/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 30161, derived from the frequency rank of both members and their visual similarity.
ulcer is recorded at frequency rank #28,066, classified as anoun, pronounced /ˈʌlsə/. user is at rank #2,095, tagged as anoun, pronounced /ˈjuːzə/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 30161, this pair ranks #356,863 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ulcer vs user
Shared letters: eru. Private to "ulcer": cl. Private to "user": s.
"ulcer" · 5 letters · shape VCCVC · "user" · 4 letters · shape VCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "ulcer" for "user" ever safe?
Frequency check: "ulcer" vs "user" - which ranks higher?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "ulcer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "user" - compare definitions side by side with the headword page. Word entry
- This pair ranks #356,863 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ulcer" and "user" also get mixed up with nearby pairs, the highest-scored neighbour is "unsee vs user". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #356,863 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.