poesy vs heroic poetry

poesy and heroic poetry both are nouns.

Word	Noun	Adjective	Verb	Adverb
poesy	Yes	No	No	No
heroic poetry	Yes	No	No	No

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

Other hyponyms of poesy include epos, epic poetry.

poesy (noun)	heroic poetry (noun)
literature in metrical form	poetry celebrating the deeds of some hero