Which to use
“IRB” is a noun and “itt” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #33,690
- “IRB” frequency rank
- #25,431
- “itt” frequency rank
- 59121
- confusion score
Side-by-Side Comparison
| Feature | IRB | itt |
|---|---|---|
| Definition | Initialism of institutional review board, a committee that reviews the designs of proposed experiments to confirm whether all the methods proposed are ethical. | Obsolete spelling of it. |
Letter map: IRB vs itt
Shared letters muted; letters that set IRB and itt apart highlighted. Shared run: 1.
Part-of-speech tell for IRB / itt
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: IRB is anoun and ittapronoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 59121, derived from the frequency rank of both members and their visual similarity.
IRB is recorded at frequency rank #33,690, classified as anoun. itt is at rank #25,431, tagged as apron.
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 59121, this pair ranks #108,173 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of IRB vs itt
Shared letters: i. Private to "IRB": br. Private to "itt": t.
"IRB" · 3 letters · shape VCC · "itt" · 3 letters · shape VCC
Frequently Asked Questions
Is swapping "IRB" for "itt" ever safe?
Frequency check: "IRB" vs "itt" - which ranks higher?
Useful next steps
Pair "IRB" vs "itt" is on the table, pick a follow-up below.
- Full dictionary entry for "IRB" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "itt" - compare definitions side by side with the headword page. Word entry
- This pair ranks #108,173 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "IRB" and "itt" also get mixed up with nearby pairs, the highest-scored neighbour is "IRB vs ith". Nearby pair
Confusion rank #108,173 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.