# ulcer

> English word · Noun · IPA /ˈʌlsə/ · frequency rank #28,066

## Definitions
1. 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.
2. Peptic ulcer.
3. Anything that festers and corrupts like an open sore; a vice in character.

## Etymology
From Old French ulcere, from Latin ulcus. Doublet of ulcus.

## Easily confused with
- **user** (https://plainspell.com/en/vs/ulcer-vs-user)
- **under** (https://plainspell.com/en/vs/ulcer-vs-under)
- **upper** (https://plainspell.com/en/vs/ulcer-vs-upper)
- **utter** (https://plainspell.com/en/vs/ulcer-vs-utter)
- **usher** (https://plainspell.com/en/vs/ulcer-vs-usher)
- **Ulster** (https://plainspell.com/en/vs/ulcer-vs-ulster)

## Common misspellings (7)
`lucer`, `ucler`, `ulccer`, `ulcerr`, `ulcre`, `ulecr`, `ullcer`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/ulcer