bum vs laze

bum is a noun but laze is not a noun.

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

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

Other hypernyms of bum include idle, slug, stagnate.

bum (noun)	laze (noun)
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

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

bum (verb)	laze (verb)
ask for and get free; be a parasite	be idle; exist in a changeless situation
be lazy or idle