# IRB

> English word · Noun · frequency rank #33,690

## Definitions
1. Initialism of institutional review board, a committee that reviews the designs of proposed experiments to confirm whether all the methods proposed are ethical.
2. Initialism of investment review board, a committee of business executives who review investment choices, comparing against strategy and opportunity costs.
3. Initialism of internal review board, an internal affairs division of a police department.
4. Initialism of inflatable rescue boat.

## Easily confused with
- **is** (https://plainspell.com/en/vs/irb-vs-is)
- **it** (https://plainspell.com/en/vs/irb-vs-it)
- **IV** (https://plainspell.com/en/vs/irb-vs-iv)
- **iz** (https://plainspell.com/en/vs/irb-vs-iz)
- **its** (https://plainspell.com/en/vs/irb-vs-its)
- **IRS** (https://plainspell.com/en/vs/irb-vs-irs)
- **ivy** (https://plainspell.com/en/vs/irb-vs-ivy)
- **iso** (https://plainspell.com/en/vs/irb-vs-iso)
- **ISA** (https://plainspell.com/en/vs/irb-vs-isa)
- **ISS** (https://plainspell.com/en/vs/irb-vs-iss)
- **IRL** (https://plainspell.com/en/vs/irb-vs-irl)
- **ISP** (https://plainspell.com/en/vs/irb-vs-isp)
- **ire** (https://plainspell.com/en/vs/irb-vs-ire)
- **IVF** (https://plainspell.com/en/vs/irb-vs-ivf)
- **IRC** (https://plainspell.com/en/vs/irb-vs-irc)
- **ISI** (https://plainspell.com/en/vs/irb-vs-isi)
- **itt** (https://plainspell.com/en/vs/irb-vs-itt)
- **ITC** (https://plainspell.com/en/vs/irb-vs-itc)
- **ISD** (https://plainspell.com/en/vs/irb-vs-isd)
- **isu** (https://plainspell.com/en/vs/irb-vs-isu)

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