lackadaisical vs idle

lackadaisical is not a noun while idle is a noun.

Word	Noun	Adjective	Verb	Adverb
lackadaisical	No	Yes	No	No
idle	Yes	Yes	Yes	No

lackadaisical (noun)	idle (noun)
	the state of an engine or other mechanism that is idling

lackadaisical (adjective)	idle (adjective)
idle or indolent especially in a dreamy way	not in action or at work
lacking spirit or liveliness	silly or trivial
	not in active use
	lacking a sense of restraint or responsibility
	not having a job
	not yielding a return
	without a basis in reason or fact

lackadaisical (verb)	idle (verb)
	run disconnected or idle
	be idle; exist in a changeless situation