blacktop vs pavement

blacktop and pavement both are nouns.

Word	Noun	Adjective	Verb	Adverb
blacktop	Yes	No	Yes	No
pavement	Yes	No	No	No

As nouns, pavement is a hypernym of blacktop; that is, pavement 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
pavement: material used to pave an area

Other hypernyms of blacktop include paving, paving material.

blacktop (noun)	pavement (noun)
a black bituminous material used for paving roads or other areas; usually spread over crushed rock	the paved surface of a thoroughfare
	walk consisting of a paved area for pedestrians; usually beside a street or roadway
	material used to pave an area

blacktop (verb)	pavement (verb)
coat with blacktop