pavement vs blacktop

pavement and blacktop both are nouns.

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

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

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

Other hyponyms of pavement include asphalt, concrete, blacktopping, macadam, tarmac, tarmacadam.

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

pavement (verb)	blacktop (verb)
	coat with blacktop