louvre vs louver

louvre and louver both are nouns.

Word	Noun	Adjective	Verb	Adverb
louvre	Yes	No	No	No
louver	Yes	No	No	No

As nouns, louvre and louver are synonyms defined as:

louvre and louver: one of a set of parallel slats in a door or window to admit air and reject rain

Other synonyms of louvre include fin.

louvre (noun)	louver (noun)
one of a set of parallel slats in a door or window to admit air and reject rain	one of a set of parallel slats in a door or window to admit air and reject rain