bum vs street person

bum and street person both are nouns.

Word	Noun	Adjective	Verb	Adverb
bum	Yes	Yes	Yes	No
street person	Yes	No	No	No

As nouns, street person is a hyponym of bum; that is, street person is a word with a more specific, narrower meaning than bum:

Other hyponyms of bum include dosser.

bum (noun)	street person (noun)
the fleshy part of the human body that you sit on	someone who sleeps in any convenient place
a vagrant
a person who is deemed to be despicable or contemptible
person who does no work

bum (adjective)	street person (adjective)
of very poor quality; flimsy

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