# sth vs STR

> English confusable word pair

## The two words

### sth
*pronoun · frequency rank #40,035*
Abbreviation of something.

### STR
*noun · frequency rank #20,507*
Initialism of short tandem repeat.

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