# FSB vs fu

> English confusable word pair

## The two words

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

### fu
*intj · frequency rank #8,543*
Initialism of fuck you.

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