paved surface vs apron

paved surface and apron both are nouns.

Word	Noun	Adjective	Verb	Adverb
paved surface	Yes	No	No	No
apron	Yes	No	No	No

As nouns, apron is a hyponym of paved surface; that is, apron is a word with a more specific, narrower meaning than paved surface:

Other hyponyms of paved surface include pavement, paving, road surface, runway, skidpan, macadam, tarmac, tarmacadam, taxi strip, taxiway.

paved surface (noun)	apron (noun)
a level horizontal surface covered with paving material	a garment of cloth or leather or plastic that is tied about the waist and worn to protect your clothing
	a paved surface where aircraft stand while not being used
	the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain)
	(golf) the part of the fairway leading onto the green