bum vs freeload

bum is a noun but freeload is not a noun.

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

As verbs, freeload is a hyponym of bum; that is, freeload is a word with a more specific, narrower meaning than bum:

bum (noun)	freeload (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)	freeload (adjective)
of very poor quality; flimsy

bum (verb)	freeload (verb)
ask for and get free; be a parasite	live off somebody's generosity
be lazy or idle