blacktop vs blacktopping

blacktop and blacktopping both are nouns.

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

As nouns, blacktop and blacktopping are synonyms defined as:

blacktop and blacktopping: a black bituminous material used for paving roads or other areas; usually spread over crushed rock

blacktop (noun)	blacktopping (noun)
a black bituminous material used for paving roads or other areas; usually spread over crushed rock	a black bituminous material used for paving roads or other areas; usually spread over crushed rock

blacktop (verb)	blacktopping (verb)
coat with blacktop