# FBI

> English word · Proper noun · IPA /ˈɛf.biː.aɪ/ · frequency rank #3,429

## Definitions
1. Initialism of Federal Bureau of Investigation.
2. Federation of British Industry (1916–1965), forerunner of CBI (Confederation of British Industry).
3. fire behaviour index

## Easily confused with
- **fi** (https://plainspell.com/en/vs/fbi-vs-fi)
- **FL** (https://plainspell.com/en/vs/fbi-vs-fl)
- **FM** (https://plainspell.com/en/vs/fbi-vs-fm)
- **Fe** (https://plainspell.com/en/vs/fbi-vs-fe)
- **fu** (https://plainspell.com/en/vs/fbi-vs-fu)
- **FF** (https://plainspell.com/en/vs/fbi-vs-ff)
- **fo** (https://plainspell.com/en/vs/fbi-vs-fo)
- **FS** (https://plainspell.com/en/vs/fbi-vs-fs)
- **FN** (https://plainspell.com/en/vs/fbi-vs-fn)
- **FP** (https://plainspell.com/en/vs/fbi-vs-fp)
- **FW** (https://plainspell.com/en/vs/fbi-vs-fw)
- **fy** (https://plainspell.com/en/vs/fbi-vs-fy)
- **for** (https://plainspell.com/en/vs/fbi-vs-for)
- **few** (https://plainspell.com/en/vs/fbi-vs-few)
- **fun** (https://plainspell.com/en/vs/fbi-vs-fun)
- **fit** (https://plainspell.com/en/vs/fbi-vs-fit)
- **fix** (https://plainspell.com/en/vs/fbi-vs-fix)
- **fly** (https://plainspell.com/en/vs/fbi-vs-fly)
- **fox** (https://plainspell.com/en/vs/fbi-vs-fox)
- **fed** (https://plainspell.com/en/vs/fbi-vs-fed)

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