blacktop vs paving material

blacktop and paving material both are nouns.

Word	Noun	Adjective	Verb	Adverb
blacktop	Yes	No	Yes	No
paving material	Yes	No	No	No

As nouns, paving material is a hypernym of blacktop; that is, paving material is a word with a broader meaning than blacktop:

blacktop: a black bituminous material used for paving roads or other areas; usually spread over crushed rock
paving material: material used to pave an area

Other hypernyms of blacktop include pavement, paving.

blacktop (noun)	paving material (noun)
a black bituminous material used for paving roads or other areas; usually spread over crushed rock	material used to pave an area

blacktop (verb)	paving material (verb)
coat with blacktop