Which to use
“IRB” and “iris” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #33,690
- “IRB” frequency rank
- #10,228
- “iris” frequency rank
- 43918
- confusion score
Side-by-Side Comparison
| Feature | IRB | iris |
|---|---|---|
| Definition | Initialism of institutional review board, a committee that reviews the designs of proposed experiments to confirm whether all the methods proposed are ethical. | A plant of the genus Iris, common in the northern hemisphere, and generally having attractive blooms (See Iris (plant) on Wikipedia.Wikipedia). |
Letter map: IRB vs iris
Shared letters muted; letters that set IRB and iris apart highlighted. Shared run: 2.
Pair insight - IRB / iris
IRB and iris are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 43918, derived from the frequency rank of both members and their visual similarity.
IRB is recorded at frequency rank #33,690, classified as anoun. iris is at rank #10,228, tagged as anoun, pronounced /ˈaɪ.ɹɪs/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 43918, this pair ranks #235,411 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of IRB vs iris
Shared letters: ir. Private to "IRB": b. Private to "iris": s.
"IRB" · 3 letters · shape VCC · "iris" · 4 letters · shape VCVC
Known mistypes of this pair
- iris ← iirs · iriss · irris · irsi · riis
Frequently Asked Questions
Can "IRB" and "iris" be used interchangeably?
Which is more common, "IRB" or "iris"?
After this comparison
Done with this confusable. These links stay specific to "IRB" and "iris".
- Full dictionary entry for "IRB" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "iris" - compare definitions side by side with the headword page. Word entry
- This pair ranks #235,411 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "IRB" and "iris" also get mixed up with nearby pairs, the highest-scored neighbour is "IRB vs ith". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #235,411 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.