slug vs bum

slug and bum both are nouns.

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

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

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

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

slug (noun)	bum (noun)
(boxing) a blow with the fist	the fleshy part of the human body that you sit on
any of various terrestrial gastropods having an elongated slimy body and no external shell	a vagrant
a projectile that is fired from a gun	a person who is deemed to be despicable or contemptible
a strip of type metal used for spacing	person who does no work
an amount of an alcoholic drink (usually liquor) that is poured or gulped
an idle slothful person
a counterfeit coin
a unit of mass equal to the mass that accelerates at 1 foot/sec/sec when acted upon by a force of 1 pound; approximately 14.5939 kilograms

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

slug (verb)	bum (verb)
strike heavily, especially with the fist or a bat	ask for and get free; be a parasite
be idle; exist in a changeless situation	be lazy or idle