Which to use
“rouge” is an adjective and “rough” is a noun - they look or sound alike but fill different roles in a sentence.
- #622
- “rouge” frequency rank
- #38,518
- “rough” frequency rank
- 39140
- confusion score
Side-by-Side Comparison
| Feature | rouge | rough |
|---|---|---|
| Definition | Qui est d’une couleur semblable à celle du sang, du coquelicot, de la fraise, etc., dont la longueur d’onde dominante est comprise entre environ 625 et 740 nm. — #E01010 #FF0000 #FF0040 #FF2000 #850606 | Bordure non entretenue d’un terrain de golf. |
Where the spellings diverge
Shared letters are muted; the letters that actually set rouge and rough apart are highlighted. They share 4 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
rouge and rough form a confusable pair in the French index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by a single letter - e in “rouge” becomes h in “rough” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 39140, derived from the frequency rank of both members and their visual similarity.
rouge is recorded at frequency rank #622, classified as anadj, pronounced \ʁuʒ\. rough is at rank #38,518, tagged as anoun, pronounced \ʁœf\.
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 39140, this pair ranks #250,209 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Frequency comparison
Frequently Asked Questions
Can "rouge" and "rough" be used interchangeably?
Remembering rouge vs rough
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “rouge”; for a noun, it's “rough”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “rouge” entry
- Browse more pairs most likely to be confused. Most confusable