poetry vs heroic poetry

poetry and heroic poetry both are nouns.

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

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

Other hyponyms of poetry include epos, epic poetry.

poetry (noun)	heroic poetry (noun)
literature in metrical form	poetry celebrating the deeds of some hero
any communication resembling poetry in beauty or the evocation of feeling