genre vs poesy

genre and poesy both are nouns.

Word	Noun	Adjective	Verb	Adverb
genre	Yes	No	No	No
poesy	Yes	No	No	No

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

Other hyponyms of genre include drama, prose, form, poetry, verse, satire, steampunk.

genre (noun)	poesy (noun)
a class of art (or artistic endeavor) having a characteristic form or technique	literature in metrical form
a kind of literary or artistic work
a style of expressing yourself in writing