slat vs louver

slat and louver both are nouns.

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

As nouns, louver is a hyponym of slat; that is, louver is a word with a more specific, narrower meaning than slat:

slat: a thin strip (wood or metal)
louver: one of a set of parallel slats in a door or window to admit air and reject rain

Other hyponyms of slat include lath, fin, louvre, splat, lag, stave.

slat (noun)	louver (noun)
a thin strip (wood or metal)	one of a set of parallel slats in a door or window to admit air and reject rain

slat (verb)	louver (verb)
close the slats of (windows)
equip or bar with slats