# stiffer vs stiller

> English confusable word pair

## The two words

### stiffer
*noun · frequency rank #36,354*
An erection of the penis.

### stiller
*adjective · frequency rank #42,921*
comparative form of still: more still

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