Which to use
“ion” is a noun and “its” is a determiner - they look or sound alike but fill different roles in a sentence.
- #5,604
- “ion” frequency rank
- #75
- “its” frequency rank
- 5679
- confusion score
Side-by-Side Comparison
| Feature | ion | its |
|---|---|---|
| Definition | An atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution. | Belonging to it. |
Where the eye mixes ion and its
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses ion with its
These two trip readers on the page rather than in the ear: ion is /ˈaɪən/ while its is /ɪts/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs determiner), which is usually the fastest check. Our composite confusion score for this pair is 5679, 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/. its is at rank #75, tagged as adet, pronounced /ɪts/.
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 5679, this pair ranks #514,374 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ion vs its
Shared letters: i. Private to "ion": no. Private to "its": st.
"ion" · 3 letters · shape VVC · "its" · 3 letters · shape VCC
Frequently Asked Questions
Is swapping "ion" for "its" ever safe?
In ordinary English text, does "ion" or "its" show up more?
After this comparison
Eye-level mix-up between "ion" and "its" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "ion" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "its" - compare definitions side by side with the headword page. Word entry
- This pair ranks #514,374 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ion" and "its" also get mixed up with nearby pairs, the highest-scored neighbour is "Ilan vs ion". Nearby pair
Confusion rank #514,374 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.