chat up vs wanton

chat up is not a noun while wanton is a noun.

Word	Noun	Adjective	Verb	Adverb
chat up	No	No	Yes	No
wanton	Yes	Yes	Yes	No

As verbs, wanton is a hyponym of chat up; that is, wanton is a word with a more specific, narrower meaning than chat up:

Other hyponyms of chat up include vamp.

chat up (noun)	wanton (noun)
	lewd or lascivious woman

chat up (adjective)	wanton (adjective)
	casual and unrestrained in sexual behavior
	occurring without motivation or provocation

chat up (verb)	wanton (verb)
talk or behave amorously, without serious intentions	behave extremely cruelly and brutally
talk to someone with the aim of persuading him	engage in amorous play
	become extravagant; indulge (oneself) luxuriously
	spend wastefully
	waste time; spend one's time idly or inefficiently
	indulge in a carefree or voluptuous way of life