onovsostConfusable pair

Which to use

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

#36,980
“ono” frequency rank
#19,617
“ost” frequency rank
56597
confusion score

Side-by-Side Comparison

Feature ono ost
Definition Enfant. ou Armée au Moyen Âge.

Where the eye mixes ono and ost

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

3 ch
ono
3 ch
ost

Visual trap between ono and ost

A purely visual mix-up. ono (\ʔono\) and ost (\ɔst\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 56597, derived from the frequency rank of both members and their visual similarity.

ono is recorded at frequency rank #36,980, classified as anoun, pronounced \ʔono\. ost is at rank #19,617, tagged as anoun, pronounced \ɔst\.

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 56597, this pair ranks #120,091 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ono vs ost

Shared letters: o. Private to "ono": n. Private to "ost": st.

"ono" · 3 letters · shape VCV  ·  "ost" · 3 letters · shape VCC

Frequently Asked Questions

Can "ono" and "ost" be used interchangeably?
No. They are said differently (\ʔono\ versus \ɔst\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary French text, does "ono" or "ost" show up more?
"ost" is the more common of the two: it sits at frequency rank #19,617 in our French list, against #36,980 for "ono". 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 "ono" and "ost" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "ono" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ost" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #120,091 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "ono" and "ost" also get mixed up with nearby pairs, the highest-scored neighbour is "och vs ono". Nearby pair

Confusion rank #120,091 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