Which to use
“iff” is a conjunction and “itt” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #45,443
- “iff” frequency rank
- #25,431
- “itt” frequency rank
- 70874
- confusion score
Side-by-Side Comparison
| Feature | iff | itt |
|---|---|---|
| Definition | Abbreviation of if and only if. | Obsolete spelling of it. |
Letter map: iff vs itt
Shared letters muted; letters that set iff and itt apart highlighted. Shared run: 1.
Grammar separator: iff vs itt
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: iff is aconjunction and ittapronoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 70874, derived from the frequency rank of both members and their visual similarity.
iff is recorded at frequency rank #45,443, classified as aconj, pronounced /ɪf ən(d)ˈəʊn.li ɪf/. 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 70874, this pair ranks #48,895 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of iff vs itt
Shared letters: i. Private to "iff": f. Private to "itt": t.
"iff" · 3 letters · shape VCC · "itt" · 3 letters · shape VCC
Frequently Asked Questions
Do "iff" and "itt" mean the same thing in a sentence?
Which is more common, "iff" or "itt"?
What to do next
Pair "iff" vs "itt" is on the table, pick a follow-up below.
- Full dictionary entry for "iff" 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 #48,895 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "iff" and "itt" also get mixed up with nearby pairs, the highest-scored neighbour is "iff vs ith". Nearby pair
Confusion rank #48,895 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.