paving vs asphalt

paving and asphalt both are nouns.

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

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

paving: 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 paving include concrete, blacktop, blacktopping, macadam, tarmac, tarmacadam.

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

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