Which to use
“ion” is a noun and “iOS” is a name - they look or sound alike but fill different roles in a sentence.
- #5,604
- “ion” frequency rank
- #5,888
- “iOS” frequency rank
- 11492
- confusion score
Side-by-Side Comparison
| Feature | ion | iOS |
|---|---|---|
| Definition | An atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution. | A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware. |
Letter map: ion vs iOS
Shared letters muted; letters that set ion and iOS apart highlighted. Shared run: 2.
Grammar separator: ion vs iOS
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ion is anoun and iOSaname. On the page they differ by a single letter - n in “ion” becomes s in “iOS”. Our composite confusion score for this pair is 11492, derived from the frequency rank of both members and their visual similarity.
ion is recorded at frequency rank #5,604, classified as anoun, pronounced /ˈaɪən/. iOS is at rank #5,888, tagged as aname.
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 11492, this pair ranks #486,755 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ion vs iOS
Shared letters: io. Private to "ion": n. Private to "iOS": s.
"ion" · 3 letters · shape VVC · "iOS" · 3 letters · shape VVC
Frequently Asked Questions
Is swapping "ion" for "iOS" ever safe?
Which is more common, "ion" or "iOS"?
What to do next
Done with this confusable. These links stay specific to "ion" and "iOS".
- Full dictionary entry for "ion" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "iOS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #486,755 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ion" and "iOS" also get mixed up with nearby pairs, the highest-scored neighbour is "Ilan vs ion". Nearby pair
Confusion rank #486,755 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.