devil-may-care vs carefree

devil-may-care and carefree both are adjectives.

Word	Noun	Adjective	Verb	Adverb
devil-may-care	No	Yes	No	No
carefree	No	Yes	No	No

As adjectives, devil-may-care and carefree are synonyms defined as:

Other synonyms of devil-may-care include freewheeling, happy-go-lucky, harum-scarum, slaphappy.

devil-may-care (adjective)	carefree (adjective)
cheerfully irresponsible	cheerfully irresponsible
marked by a carefree unconventionality or disreputableness	free of trouble and worry and care