cœur vs Cyr, What's the Difference?

Which to use

“cœur” is a noun and “Cyr” is a name - they look or sound alike but fill different roles in a sentence.

#552
“cœur” frequency rank: #12,760
“Cyr” frequency rank: 13312
confusion score

Side-by-Side Comparison

Feature	cœur	Cyr
Definition	Organe musculaire, creux et pulsatile assurant la circulation sanguine dans le corps humain ou animal.	Nom de famille.

Where the spellings diverge

Shared letters are muted; the letters that actually set cœur and Cyr apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

4 ch

cœur

3 ch

Cyr

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: cœur is \kœʁ\ while Cyr is \siʁ\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs name), which is usually the fastest check. Our composite confusion score for this pair is 13312, derived from the frequency rank of both members and their visual similarity.

cœur is recorded at frequency rank #552, classified as anoun, pronounced \kœʁ\. Cyr is at rank #12,760, tagged as aname, pronounced \siʁ\.

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 13312, this pair ranks #401,519 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of cœur vs Cyr

Shared letters: cr. Private to "cœur": uœ. Private to "Cyr": y.

"cœur" · 4 letters · shape CVVC · "Cyr" · 3 letters · shape CVC

Frequency comparison

cœur#552

Cyr#12,760

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "cœur" and "Cyr" be used interchangeably?

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

Which is more common, "cœur" or "Cyr"?

"cœur" is the more common of the two: it sits at frequency rank #552 in our French list, against #12,760 for "Cyr". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering cœur vs Cyr

The fastest way to pick the right one every time.

Check the role first: if you need a noun, it's “cœur”; for a name, it's “Cyr”.
See each word in full, definition, IPA, etymology and its other confusables. Full “cœur” entry
Browse more pairs most likely to be confused. Most confusable