# REM vs RR

> English confusable word pair

## The two words

### REM
*noun · frequency rank #20,207*
Initialism of rapid eye movement.

### RR
*noun · frequency rank #17,232*
Initialism of railroad.

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