sidewalk vs paving

sidewalk and paving both are nouns.

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

sidewalk (noun)	paving (noun)
walk consisting of a paved area for pedestrians; usually beside a street or roadway	the act of applying paving materials to an area
	the paved surface of a thoroughfare
	material used to pave an area