# um vs USD

> English confusable word pair

## The two words

### um
*intj · IPA /ʌm/ · frequency rank #5,846*
Expression of hesitation, uncertainty or space filler in conversation.

### 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/um-vs-usd