# LEM vs lest

> English confusable word pair

## The two words

### LEM
*noun · frequency rank #35,810*
Originally Lunar Excursion Module, latterly Lunar Module.

### lest
*conjunction · IPA /lɛst/ · frequency rank #14,158*
For fear that; that not; in order to prevent something from happening; in case.

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