# optimism vs optimum

> English confusable word pair

## The two words

### optimism
*noun · IPA /ˈɑptɪmɪzəm/ · frequency rank #11,926*
a tendency to expect the best, or at least, a favourable outcome

### optimum
*noun · IPA /ˈɑptɪməm/ · frequency rank #14,178*
The best or most favorable condition, or the greatest amount or degree possible under specific sets of comparable circumstances.

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