# ester vs Euler

> English confusable word pair

## The two words

### ester
*noun · IPA /ˈɛstɚ/ · frequency rank #26,780*
A compound most often formed by the condensation of an alcohol and an acid, with elimination of water, which contains the functional group carbon-oxygen double bond (i.e., carbonyl) joined via carbon to another oxygen atom.

### Euler
*name · IPA /ˈɔɪlə/ · frequency rank #37,446*
A surname.

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