ICD vs it, What's the Difference?

Which to use

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

#34,926
“ICD” frequency rank: #12
“it” frequency rank: 34938
confusion score

Side-by-Side Comparison

Feature	ICD	it
Definition	Initialism of implantable cardioverter-defibrillator.	The third-person singular neuter personal pronoun used to refer to an inanimate object, abstract entity, or non-human living thing.

Letter map: ICD vs it

Shared letters muted; letters that set ICD and it apart highlighted. Shared run: 1. ICD runs 3 letters (VCC) against it's 2 (VC) - the length gap alone is often enough to separate them once you know to check it.

3 ch

ICD

2 ch

Grammar separator: ICD vs it

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ICD is anoun and itapronoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 34938, derived from the frequency rank of both members and their visual similarity.

ICD is recorded at frequency rank #34,926, classified as anoun. it is at rank #12, tagged as apron, pronounced /ɪt/.

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 34938, this pair ranks #316,341 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ICD vs it

Shared letters: i. Private to "ICD": cd. Private to "it": t.

"ICD" · 3 letters · shape VCC · "it" · 2 letters · shape VC

Frequently Asked Questions

Is swapping "ICD" for "it" ever safe?

No - they are not even the same part of speech. "ICD" is a noun and "it" a pronoun, so a sentence built for one is usually ungrammatical with the other.

Frequency check: "ICD" vs "it" - which ranks higher?

"it" is the more common of the two: it sits at frequency rank #12 in our English list, against #34,926 for "ICD". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

You've compared "ICD" and "it". Here's where to go from here.

Full dictionary entry for "ICD" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "it" - compare definitions side by side with the headword page. Word entry
This pair ranks #316,341 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"ICD" and "it" also get mixed up with nearby pairs, the highest-scored neighbour is "ICD vs ith". Nearby pair

Confusion rank #316,341 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.