perfunctory vs careless

perfunctory and careless both are adjectives.

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

perfunctory (adjective)	careless (adjective)
hasty and without attention to detail; not thorough	marked by lack of attention or consideration or forethought or thoroughness; not careful
done or produced as a formality only	effortless and unstudied
	(usually followed by `of') without due thought or consideration