bum vs mooch

bum and mooch both are nouns.

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

As verbs, bum and mooch are synonyms defined as:

Other synonyms of bum include cadge, grub, sponge.

bum (noun)	mooch (noun)
the fleshy part of the human body that you sit on	someone who mooches or cadges (tries to get something free)
a vagrant
a person who is deemed to be despicable or contemptible
person who does no work

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

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