slothful vs idle

slothful is not a noun while idle is a noun.

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

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

slothful (adjective)	idle (adjective)
disinclined to work or exertion	not in action or at work
	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

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