Which to use
“A1” and “ad” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #17,858
- “A1” frequency rank
- #5,098
- “ad” frequency rank
- 22956
- confusion score
Side-by-Side Comparison
| Feature | A1 | ad |
|---|---|---|
| Definition | Format d'une feuille de 594,6 mm sur 840,9. | Pub, publicité ; réclame. |
Where the eye mixes A1 and ad
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: A1 vs ad
A purely visual mix-up. A1 (\a.œ̃\) and ad (\æd\) 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 - 1 in “A1” becomes d in “ad”. Our composite confusion score for this pair is 22956, derived from the frequency rank of both members and their visual similarity.
A1 is recorded at frequency rank #17,858, classified as anoun, pronounced \a.œ̃\. ad is at rank #5,098, tagged as anoun, pronounced \æd\.
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 22956, this pair ranks #355,178 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of A1 vs ad
Shared letters: a. Private to "A1": -. Private to "ad": d.
"A1" · 1 letters · shape V · "ad" · 2 letters · shape VC
Frequently Asked Questions
Can "A1" and "ad" be used interchangeably?
Which is more common, "A1" or "ad"?
What to do next
Eye-level mix-up between "A1" and "ad" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "A1" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ad" - compare definitions side by side with the headword page. Word entry
- This pair ranks #355,178 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "A1" and "ad" also get mixed up with nearby pairs, the highest-scored neighbour is "A1 vs aur". Nearby pair
Confusion rank #355,178 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.