# IRS vs ISA

> English confusable word pair

## The two words

### IRS
*name · IPA /ˈaɪ.ɑɹ.ɛs/ · frequency rank #8,440*
Initialism of Internal Revenue Service.

### ISA
*noun · IPA /ˈaɪsə/ · frequency rank #13,178*
Initialism of instruction set architecture.

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