radvsrouWhat's the difference?

Quick tell: rad is a symbol, rou is a noun, so they fill different roles in a sentence.

Which to use

“rad” is a symbol and “rou” is a noun - they look or sound alike but fill different roles in a sentence.

#28,705
“rad” frequency rank
#48,169
“rou” frequency rank
76874
confusion score

Side-by-Side Comparison

Feature rad rou
Definition Symbole du radian, unité de mesure d’angle plan du Système international (SI). Synonyme de rohu (poisson).

Letter map: rad vs rou

Shared letters muted; letters that set rad and rou apart highlighted. Shared run: 1.

3 ch
rad
3 ch
rou

Spelling & Dictionary Insight

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: rad is asymbol and rouanoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 76874, derived from the frequency rank of both members and their visual similarity.

rad is recorded at frequency rank #28,705, classified as asymbol. rou is at rank #48,169, tagged as anoun, pronounced \ʁu\.

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 76874, this pair ranks #29,948 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of rad vs rou

Shared letters: r. Private to "rad": ad. Private to "rou": ou.

"rad" · 3 letters · shape CVC  ·  "rou" · 3 letters · shape CVV

Frequently Asked Questions

Can "rad" and "rou" be used interchangeably?
No - they are not even the same part of speech. "rad" is a symbol and "rou" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "rad" or "rou"?
"rad" is the more common of the two: it sits at frequency rank #28,705 in our French list, against #48,169 for "rou". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list