lie around vs idle

lie around is not a noun while idle is a noun.

Word	Noun	Adjective	Verb	Adverb
lie around	No	No	Yes	No
idle	Yes	Yes	Yes	No

As verbs, idle is a hypernym of lie around; that is, idle is a word with a broader meaning than lie around:

Other hypernyms of lie around include laze, slug, stagnate.

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

lie around (adjective)	idle (adjective)
	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

lie around (verb)	idle (verb)
hang around idly	run disconnected or idle
	be idle; exist in a changeless situation