# ICAO vs ISA

> English confusable word pair

## The two words

### ICAO
*name · IPA /ˌaɪˈkeɪˌoʊ/ · frequency rank #41,186*
Acronym of International Civil Aviation Organization, a United Nations agency headquartered in Montreal, Canada.

### 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/icao-vs-isa