ionvsionsTell them apart

Which to use

“ion” and “ions” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#14,064
“ion” frequency rank
#17,978
“ions” frequency rank
32042
confusion score

Side-by-Side Comparison

Feature ion ions
Definition Atome ou molécule ayant perdu ou gagné des électrons sur sa couche externe. Pluriel de ion.

Same sound, different letters: ion vs ions

Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 3 letters.

3 ch
ion
4 ch
ions

Ear matches; page differs - ion and ions

This is the hard kind. ion and ions are pronounced identically (\jɔ̃\) and both work as anoun. Neither the ear nor the grammar will rescue you; only the meaning does, so the glosses below are the whole decision. They differ by 1 extra letter(s) - “ion” sits inside “ions”. Our composite confusion score for this pair is 32042, derived from the frequency rank of both members and their visual similarity.

ion is recorded at frequency rank #14,064, classified as anoun, pronounced \jɔ̃\. ions is at rank #17,978, tagged as anoun, pronounced \jɔ̃\.

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 32042, this pair ranks #299,925 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ion vs ions

Shared letters: ino. Private to "ion": -. Private to "ions": s.

"ion" · 3 letters · shape VVC  ·  "ions" · 4 letters · shape VVCC

Known mistypes of this pair

  • ionsinos · ionns · ionss · iosn · oins

Frequently Asked Questions

Do "ion" and "ions" mean the same thing in a sentence?
No. They are pronounced the same (\jɔ̃\), which is exactly why they get swapped in writing, but the dictionary meanings above are different, and pronunciation is no guide here.
In ordinary French text, does "ion" or "ions" show up more?
"ion" is the more common of the two: it sits at frequency rank #14,064 in our French list, against #17,978 for "ions". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

"ion" and "ions" share a sound, keep the gloss open, then jump to the headword or a nearby trap.

  • Full dictionary entry for "ion" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ions" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #299,925 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "ion" and "ions" also get mixed up with nearby pairs, the highest-scored neighbour is "Ilona vs ions". 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 #299,925 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list