Which to use
“mad” is an adjective and “MP4” is a name - they look or sound alike but fill different roles in a sentence.
- #13,833
- “mad” frequency rank
- #49,242
- “MP4” frequency rank
- 63075
- confusion score
Side-by-Side Comparison
| Feature | mad | MP4 |
|---|---|---|
| Definition | Fou. | Norme d’encodage multimédia (audio ou vidéo) sous forme numérique. |
Where the eye mixes mad and MP4
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between mad and MP4
These two trip readers on the page rather than in the ear: mad is \mæd\ while MP4 is \ɛm.pe.katʁ\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adjective vs name), which is usually the fastest check. Our composite confusion score for this pair is 63075, derived from the frequency rank of both members and their visual similarity.
mad is recorded at frequency rank #13,833, classified as anadj, pronounced \mæd\. MP4 is at rank #49,242, tagged as aname, pronounced \ɛm.pe.katʁ\.
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 63075, this pair ranks #83,831 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of mad vs MP4
Shared letters: m. Private to "mad": ad. Private to "MP4": p.
"mad" · 3 letters · shape CVC · "MP4" · 2 letters · shape CC
Frequently Asked Questions
Can "mad" and "MP4" be used interchangeably?
Which is more common, "mad" or "MP4"?
After this comparison
Eye-level mix-up between "mad" and "MP4" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "mad" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "MP4" - compare definitions side by side with the headword page. Word entry
- This pair ranks #83,831 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "mad" and "MP4" also get mixed up with nearby pairs, the highest-scored neighbour is "MP4 vs MWh". Nearby pair
Confusion rank #83,831 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.