# onset vs OST

> English confusable word pair

## The two words

### onset
*noun · IPA /ˈɒnˌsɛt/ · frequency rank #10,900*
The initial phase of a disease or condition, in which symptoms first become apparent.

### OST
*noun · frequency rank #21,603*
Initialism of original soundtrack.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/onset-vs-ost