combing vs comb

combing and comb both are nouns.

Word	Noun	Adjective	Verb	Adverb
combing	Yes	No	No	No
comb	Yes	No	Yes	No

As nouns, combing and comb are synonyms defined as:

combing (noun)	comb (noun)
the act of drawing a comb through hair	the act of drawing a comb through hair
	ciliated comb-like swimming plate of a ctenophore
	the fleshy red crest on the head of the domestic fowl and other gallinaceous birds
	a flat device with narrow pointed teeth on one edge; disentangles or arranges hair
	any of several tools for straightening fibers

combing (verb)	comb (verb)
	smoothen and neaten with or as with a comb
	search thoroughly
	straighten with a comb