# fasten vs fastest

> English confusable word pair

## The two words

### fasten
*verb · IPA /ˈfɑːsn̩/ · frequency rank #29,649*
To attach or connect in a secure manner.

### fastest
*adjective · frequency rank #4,759*
superlative form of fast (adjective): most fast

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