rad vs Re, What's the Difference?

Which to use

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

#28,705
“rad” frequency rank: #2,641
“Re” frequency rank: 31346
confusion score

Side-by-Side Comparison

Feature	rad	Re
Definition	Symbole du radian, unité de mesure d’angle plan du Système international (SI).	Taux effectif de transmission d’une maladie.

Letter map: rad vs Re

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

3 ch

rad

2 ch

Grammar separator: rad vs Re

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: rad is asymbol and Reanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 31346, derived from the frequency rank of both members and their visual similarity.

rad is recorded at frequency rank #28,705, classified as asymbol. Re is at rank #2,641, tagged as anoun, pronounced \ɛ.ʁœ\.

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 31346, this pair ranks #304,374 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of rad vs Re

Shared letters: r. Private to "rad": ad. Private to "Re": e.

"rad" · 3 letters · shape CVC · "Re" · 2 letters · shape CV

Frequently Asked Questions

Is swapping "rad" for "Re" ever safe?

No - they are not even the same part of speech. "rad" is a symbol and "Re" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "rad" or "Re"?

"Re" is the more common of the two: it sits at frequency rank #2,641 in our French list, against #28,705 for "rad". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Pair "rad" vs "Re" is on the table, pick a follow-up below.

Full dictionary entry for "rad" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "Re" - compare definitions side by side with the headword page. Word entry
This pair ranks #304,374 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"rad" and "Re" also get mixed up with nearby pairs, the highest-scored neighbour is "rad vs RAMQ". Nearby pair

Confusion rank #304,374 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.