# UFO vs USD

> English confusable word pair

## The two words

### UFO
*noun · IPA /ˌjuːɛfˈəʊ/ · frequency rank #15,539*
Initialism of unidentified flying object; (loosely) an alien spacecraft.

### USD
*noun · frequency rank #7,515*
Initialism of unified school district.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/ufo-vs-usd