ICOvsisWhich spelling fits?

Quick tell: ICO is a noun, is is a verb, so they fill different roles in a sentence.

Which to use

“ICO” is a noun and “is” is a verb - they look or sound alike but fill different roles in a sentence.

#23,564
“ICO” frequency rank
#8
“is” frequency rank
23572
confusion score

Side-by-Side Comparison

Feature ICO is
Definition Initialism of initial coin offering. third-person singular simple present indicative of be

Letter map: ICO vs is

Shared letters muted; letters that set ICO and is apart highlighted. Shared run: 1.

3 ch
ICO
2 ch
is

Part-of-speech tell for ICO / is

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ICO is anoun and isaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 23572, derived from the frequency rank of both members and their visual similarity.

ICO is recorded at frequency rank #23,564, classified as anoun. is is at rank #8, tagged as averb, pronounced /ɪz/.

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 23572, this pair ranks #408,319 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ICO vs is

Shared letters: i. Private to "ICO": co. Private to "is": s.

"ICO" · 3 letters · shape VCV  ·  "is" · 2 letters · shape VC

Frequently Asked Questions

Is swapping "ICO" for "is" ever safe?
No - they are not even the same part of speech. "ICO" is a noun and "is" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ICO" or "is"?
"is" is the more common of the two: it sits at frequency rank #8 in our English list, against #23,564 for "ICO". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "ICO" and "is".

  • Full dictionary entry for "ICO" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "is" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #408,319 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "ICO" and "is" also get mixed up with nearby pairs, the highest-scored neighbour is "ICO vs ith". Nearby pair

Confusion rank #408,319 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