bop vs hard bop

bop and hard bop both are nouns.

Word	Noun	Adjective	Verb	Adverb
bop	Yes	No	Yes	No
hard bop	Yes	No	No	No

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

bop: an early form of modern jazz (originating around 1940)
hard bop: a type of music resembling the blues that is related to, but more earthy and modal in approach than, straight bop.

bop (noun)	hard bop (noun)
an early form of modern jazz (originating around 1940)	a type of music resembling the blues that is related to, but more earthy and modal in approach than, straight bop.

bop (verb)	hard bop (verb)
hit hard
dance the bebop