indolent vs idle

indolent is not a noun while idle is a noun.

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

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

indolent (adjective)	idle (adjective)
disinclined to work or exertion	not in action or at work
(of tumors, e.g.) slow to heal or develop and usually painless	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

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