isovsittWhich spelling fits?

Quick tell: iso is a noun, itt is a pronoun, so they fill different roles in a sentence.

Which to use

“iso” is a noun and “itt” is a pronoun - they look or sound alike but fill different roles in a sentence.

#9,771
“iso” frequency rank
#25,431
“itt” frequency rank
35202
confusion score

Side-by-Side Comparison

Feature iso itt
Definition Clipping of isolation. Obsolete spelling of it.

Letter map: iso vs itt

Shared letters muted; letters that set iso and itt apart highlighted. Shared run: 1.

3 ch
iso
3 ch
itt

Grammar separator: iso vs itt

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: iso 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 35202, derived from the frequency rank of both members and their visual similarity.

iso is recorded at frequency rank #9,771, classified as anoun, pronounced /ˈaɪsəʊ/. 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 35202, this pair ranks #314,022 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of iso vs itt

Shared letters: i. Private to "iso": os. Private to "itt": t.

"iso" · 3 letters · shape VCV  ·  "itt" · 3 letters · shape VCC

Frequently Asked Questions

Can "iso" and "itt" be used interchangeably?
No - they are not even the same part of speech. "iso" is a noun and "itt" a pronoun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "iso" vs "itt" - which ranks higher?
"iso" is the more common of the two: it sits at frequency rank #9,771 in our English list, against #25,431 for "itt". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "iso" and "itt".

  • Full dictionary entry for "iso" 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 #314,022 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "iso" and "itt" also get mixed up with nearby pairs, the highest-scored neighbour is "ith vs itt". Nearby pair

Confusion rank #314,022 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list