Which to use
“ion” is a noun and “ist” is a verb - they look or sound alike but fill different roles in a sentence.
- #22,745
- “ion” frequency rank
- #41,994
- “ist” frequency rank
- 64739
- confusion score
Side-by-Side Comparison
| Feature | ion | ist |
|---|---|---|
| Definition | Partícula cargada eléctricamente constituida por un átomo o molécula que no es eléctricamente neutro. | Tercera persona del singular (er, sie, es) del presente de indicativo de sein. |
Where the eye mixes ion and ist
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. ion (VVC) and ist (VCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Why the eye confuses ion with ist
These two trip readers on the page rather than in the ear: ion is [ˈjõn] while ist is /ɪst/. 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 verb), which is usually the fastest check. Our composite confusion score for this pair is 64739, derived from the frequency rank of both members and their visual similarity.
ion is recorded at frequency rank #22,745, classified as anoun, pronounced [ˈjõn]. ist is at rank #41,994, tagged as averb, pronounced /ɪst/.
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 64739, this pair ranks #44,720 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of ion vs ist
Shared letters: i. Private to "ion": no. Private to "ist": st.
"ion" · 3 letters · shape VVC · "ist" · 3 letters · shape VCC
Frequently Asked Questions
Is swapping "ion" for "ist" ever safe?
Which is more common, "ion" or "ist"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "ion" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ist" - compare definitions side by side with the headword page. Word entry
- This pair ranks #44,720 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "ion" and "ist" also get mixed up with nearby pairs, the highest-scored neighbour is "ist vs iza". Nearby pair
Confusion rank #44,720 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.