careless vs unheeding

careless and unheeding both are adjectives.

Word	Noun	Adjective	Verb	Adverb
careless	No	Yes	No	No
unheeding	No	Yes	No	No

careless (adjective)	unheeding (adjective)
marked by lack of attention or consideration or forethought or thoroughness; not careful	marked by or paying little heed or attention
effortless and unstudied
(usually followed by `of') without due thought or consideration