# serine vs string

> English confusable word pair

## The two words

### serine
*noun · frequency rank #45,078*
A nonessential amino acid, CH₂OH.CH(NH₂)COOH, found in most animal proteins, notably silk.

### string
*noun · IPA /stɹɪŋ/ · frequency rank #3,658*
A long, thin and flexible structure made from threads twisted together.

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