curled vs curling

curled is not a noun while curling is a noun.

Word	Noun	Adjective	Verb	Adverb
curled	No	Yes	No	No
curling	Yes	Yes	No	No

As adjectives, curled and curling are synonyms defined as:

curled (noun)	curling (noun)
	a game played on ice in which heavy stones with handles are slid toward a target

curled (adjective)	curling (adjective)
(of hair) making curls or having been made to curl	(of hair) making curls or having been made to curl