bum about vs idle

bum about is not a noun while idle is a noun.

Word	Noun	Adjective	Verb	Adverb
bum about	No	No	Yes	No
idle	Yes	Yes	Yes	No

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

Other hypernyms of bum about include laze, slug, stagnate.

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

bum about (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

bum about (verb)	idle (verb)
be lazy or idle	run disconnected or idle
	be idle; exist in a changeless situation