ie vs io, What's the Difference?

Which to use

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

#7,068
“ie” frequency rank: #23,588
“io” frequency rank: 30656
confusion score

Side-by-Side Comparison

Feature	ie	io
Definition	Neuvième lettre de l’alphabet cyrillique, е.	Septième lettre de l’alphabet cyrillique, ё.

Where the eye mixes ie and io

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch

Why the eye confuses ie with io

A purely visual mix-up. ie (\je\) and io (\jo\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - e in “ie” becomes o in “io”. Our composite confusion score for this pair is 30656, derived from the frequency rank of both members and their visual similarity.

ie is recorded at frequency rank #7,068, classified as anoun, pronounced \je\. io is at rank #23,588, tagged as anoun, pronounced \jo\.

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 30656, this pair ranks #308,841 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ie vs io

Shared letters: i. Private to "ie": e. Private to "io": o.

"ie" · 2 letters · shape VV · "io" · 2 letters · shape VV

Frequently Asked Questions

Is swapping "ie" for "io" ever safe?

No. They are said differently (\je\ versus \jo\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Which is more common, "ie" or "io"?

"ie" is the more common of the two: it sits at frequency rank #7,068 in our French list, against #23,588 for "io". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "ie" and "io" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "ie" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "io" - compare definitions side by side with the headword page. Word entry
This pair ranks #308,841 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"ie" and "io" also get mixed up with nearby pairs, the highest-scored neighbour is "io vs isi". Nearby pair

Confusion rank #308,841 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.