pavement vs asphalt

pavement and asphalt both are nouns.

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

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

pavement: material used to pave an area
asphalt: mixed asphalt and crushed gravel or sand; used especially for paving but also for roofing

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

pavement (noun)	asphalt (noun)
the paved surface of a thoroughfare	a dark bituminous substance found in natural beds and as residue from petroleum distillation; consists mainly of hydrocarbons
walk consisting of a paved area for pedestrians; usually beside a street or roadway	mixed asphalt and crushed gravel or sand; used especially for paving but also for roofing
material used to pave an area

pavement (verb)	asphalt (verb)
	cover with tar or asphalt