# USD vs USS

> English confusable word pair

## The two words

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

### USS
*noun · frequency rank #16,157*
Initialism of United States Ship.

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