goof-off vs bum

goof-off and bum both are nouns.

Word	Noun	Adjective	Verb	Adverb
goof-off	Yes	No	No	No
bum	Yes	Yes	Yes	No

As nouns, bum is a hypernym of goof-off; that is, bum is a word with a broader meaning than goof-off:

Other hypernyms of goof-off include do-nothing, idler, layabout, loafer.

goof-off (noun)	bum (noun)
an idle worthless person	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

goof-off (adjective)	bum (adjective)
	of very poor quality; flimsy

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