careless vs inattentive

careless and inattentive both are adjectives.

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

careless (adjective)	inattentive (adjective)
marked by lack of attention or consideration or forethought or thoroughness; not careful	showing a lack of attention or care
effortless and unstudied	not showing due care or attention
(usually followed by `of') without due thought or consideration