# RR vs RS

> English confusable word pair

## The two words

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

### RS
*noun · frequency rank #5,356*
Initialism of recommended standard.

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