Which to use
“ad” and “an” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #5,098
- “ad” frequency rank
- #363
- “an” frequency rank
- 5461
- confusion score
Side-by-Side Comparison
| Feature | ad | an |
|---|---|---|
| Definition | Pub, publicité ; réclame. | Temps que met la Terre à accomplir une révolution autour du Soleil et qui se divise en douze mois. Année (voir Notes plus bas). |
Where the eye mixes ad and an
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses ad with an
A purely visual mix-up. ad (\æd\) and an (\ɑ̃\) 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 - d in “ad” becomes n in “an”. Our composite confusion score for this pair is 5461, derived from the frequency rank of both members and their visual similarity.
ad is recorded at frequency rank #5,098, classified as anoun, pronounced \æd\. an is at rank #363, tagged as anoun, pronounced \ɑ̃\.
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 5461, this pair ranks #428,953 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ad vs an
Shared letters: a. Private to "ad": d. Private to "an": n.
"ad" · 2 letters · shape VC · "an" · 2 letters · shape VC
Frequently Asked Questions
Can "ad" and "an" be used interchangeably?
Which is more common, "ad" or "an"?
After this comparison
Eye-level mix-up between "ad" and "an" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "ad" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "an" - compare definitions side by side with the headword page. Word entry
- This pair ranks #428,953 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "ad" and "an" also get mixed up with nearby pairs, the highest-scored neighbour is "ad vs aur". Nearby pair
Confusion rank #428,953 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.