ies vs ISSN, What's the Difference?

Which to use

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

#25,358
“ies” frequency rank: #37,392
“ISSN” frequency rank: 62750
confusion score

Side-by-Side Comparison

Feature	ies	ISSN
Definition	Pluriel de ie.	Numéro international d’identification des publications périodiques.

Where the eye mixes ies and ISSN

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. ies runs 3 letters (VVC) against ISSN's 4 (VCCC) - the length gap alone is often enough to separate them once you know to check it.

3 ch

ies

4 ch

ISSN

Why the eye confuses ies with ISSN

A purely visual mix-up. ies (\je\) and ISSN (\i.ɛ.s‿ɛ.s‿ɛn\) 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 1 letter(s) in length. Our composite confusion score for this pair is 62750, derived from the frequency rank of both members and their visual similarity.

ies is recorded at frequency rank #25,358, classified as anoun, pronounced \je\. ISSN is at rank #37,392, tagged as anoun, pronounced \i.ɛ.s‿ɛ.s‿ɛn\.

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 62750, this pair ranks #85,489 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of ies vs ISSN

Shared letters: is. Private to "ies": e. Private to "ISSN": n.

"ies" · 3 letters · shape VVC · "ISSN" · 4 letters · shape VCCC

Known mistypes of this pair

ISSN ← isn · isns · issnn · sisn

Frequently Asked Questions

Is swapping "ies" for "ISSN" ever safe?

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

Which is more common, "ies" or "ISSN"?

"ies" is the more common of the two: it sits at frequency rank #25,358 in our French list, against #37,392 for "ISSN". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

Full dictionary entry for "ies" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ISSN" - compare definitions side by side with the headword page. Word entry
This pair ranks #85,489 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"ies" and "ISSN" also get mixed up with nearby pairs, the highest-scored neighbour is "isi vs ISSN". 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 #85,489 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.