# FSA vs FSB

> English confusable word pair

## The two words

### FSA
*noun · frequency rank #24,161*
Initialism of flexible spending account or flexible spending arrangement.

### FSB
*name · frequency rank #32,815*
The Federal Security Service of the Russian Federation.

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