carefree vs slaphappy

carefree and slaphappy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
carefree	No	Yes	No	No
slaphappy	No	Yes	No	No

As adjectives, carefree and slaphappy are synonyms defined as:

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

carefree (adjective)	slaphappy (adjective)
cheerfully irresponsible	dazed from or as if from repeated blows
free of trouble and worry and care	cheerfully irresponsible