layabout vs bum

layabout and bum both are nouns.

Word	Noun	Adjective	Verb	Adverb
layabout	Yes	No	No	No
bum	Yes	Yes	Yes	No

As nouns, layabout and bum are synonyms defined as:

Other synonyms of layabout include do-nothing, idler, loafer.

layabout (noun)	bum (noun)
person who does no work	the fleshy part of the human body that you sit on
	a vagrant
	a person who is deemed to be despicable or contemptible
	person who does no work

layabout (adjective)	bum (adjective)
	of very poor quality; flimsy

layabout (verb)	bum (verb)
	ask for and get free; be a parasite
	be lazy or idle