Which to use
“ICAO” is a name and “io” is a noun - they look or sound alike but fill different roles in a sentence.
- #41,186
- “ICAO” frequency rank
- #16,946
- “io” frequency rank
- 58132
- confusion score
Side-by-Side Comparison
| Feature | ICAO | io |
|---|---|---|
| Definition | Acronym of International Civil Aviation Organization, a United Nations agency headquartered in Montreal, Canada. | A type of moth, the io moth. |
Where the spellings diverge
Shared letters are muted; the letters that actually set ICAO and io apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: ICAO is /ˌaɪˈkeɪˌoʊ/ while io is /ˈaɪəʊ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 58132, 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/. io is at rank #16,946, tagged as anoun, pronounced /ˈaɪəʊ/.
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 58132, this pair ranks #114,677 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of ICAO vs io
Shared letters: io. Private to "ICAO": ac. Private to "io": -.
"ICAO" · 4 letters · shape VCVV · "io" · 2 letters · shape VV
Known mistypes of this pair
- ICAO ← iaco · iccao · icoa
Frequency comparison
Frequently Asked Questions
Can "ICAO" and "io" be used interchangeably?
Which is more common, "ICAO" or "io"?
Remembering ICAO vs io
The fastest way to pick the right one every time.
- Check the role first: if you need a name, it's “ICAO”; for a noun, it's “io”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “ICAO” entry
- Browse more pairs most likely to be confused. Most confusable