# FISA vs FSB

> English confusable word pair

## The two words

### FISA
*name · frequency rank #32,399*
Acronym of Foreign Intelligence Surveillance Act.

### 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/fisa-vs-fsb