ICAOvsIMHOWhich spelling fits?

Quick tell: ICAO is a name, IMHO is a phrase, so they fill different roles in a sentence.

Which to use

“ICAO” is a name and “IMHO” is a phrase - they look or sound alike but fill different roles in a sentence.

#41,186
“ICAO” frequency rank
#31,613
“IMHO” frequency rank
72799
confusion score

Side-by-Side Comparison

Feature ICAO IMHO
Definition Acronym of International Civil Aviation Organization, a United Nations agency headquartered in Montreal, Canada. Initialism of in my humble opinion.

Letter map: ICAO vs IMHO

Shared letters muted; letters that set ICAO and IMHO apart highlighted. Shared run: 2. ICAO (VCVV) and IMHO (VCCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

4 ch
ICAO
4 ch
IMHO

Part-of-speech tell for ICAO / IMHO

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ICAO is aname and IMHOaphrase. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 72799, derived from the frequency rank of both members and their visual similarity.

ICAO is recorded at frequency rank #41,186, classified as aname, pronounced /ˌaɪˈkeɪˌoʊ/. IMHO is at rank #31,613, tagged as aphrase.

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 72799, this pair ranks #41,798 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of ICAO vs IMHO

Shared letters: io. Private to "ICAO": ac. Private to "IMHO": hm.

"ICAO" · 4 letters · shape VCVV  ·  "IMHO" · 4 letters · shape VCCV

Known mistypes of this pair

  • ICAO ← iaco · iccao · icoa
  • IMHO ← ihmo · imhho · immho · imoh

Frequently Asked Questions

Is swapping "ICAO" for "IMHO" ever safe?
No - they are not even the same part of speech. "ICAO" is a name and "IMHO" a phrase, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ICAO" or "IMHO"?
"IMHO" is the more common of the two: it sits at frequency rank #31,613 in our English list, against #41,186 for "ICAO". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "ICAO" and "IMHO".

  • Full dictionary entry for "ICAO" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "IMHO" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #41,798 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "ICAO" and "IMHO" also get mixed up with nearby pairs, the highest-scored neighbour is "ICAO vs Ilan". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #41,798 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