# SSR vs STM

> French confusable word pair

## The two words

### SSR
*noun · IPA \ɛs.ɛs.ɛʁ\ · frequency rank #49,370*
Sexe sans risque, safe sex.

### STM
*noun · frequency rank #23,698*
Microscopie à effet tunnel.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-02.
Canonical page: https://plainspell.com/fr/vs/ssr-vs-stm