Which to use
“fou” is an adjective and “frog” is a noun - they look or sound alike but fill different roles in a sentence.
- #1,063
- “fou” frequency rank
- #42,890
- “frog” frequency rank
- 43953
- confusion score
Side-by-Side Comparison
| Feature | fou | frog |
|---|---|---|
| Definition | Qualifie une personne qui a perdu la raison, qui est atteinte d’aliénation mentale. | Surnom dont des Canadiens non francophones affublent les Québécois francophones. |
Where the spellings diverge
Shared letters are muted; the letters that actually set fou and frog apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
fou and frog 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 1 letter(s) in length - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 43953, derived from the frequency rank of both members and their visual similarity.
fou is recorded at frequency rank #1,063, classified as anadj, pronounced \fu\. frog is at rank #42,890, tagged as anoun, pronounced \fɹɒɡ\.
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 43953, this pair ranks #214,124 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Frequency comparison
Frequently Asked Questions
Can "fou" and "frog" be used interchangeably?
Remembering fou vs frog
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “fou”; for a noun, it's “frog”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “fou” entry
- Browse more pairs most likely to be confused. Most confusable