bum vs tinny

bum is a noun but tinny is not a noun.

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

As adjectives, bum and tinny are synonyms defined as:

Other synonyms of bum include cheap, cheesy, chintzy, crummy, punk, sleazy.

bum (noun)	tinny (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)	tinny (adjective)
of very poor quality; flimsy	of or containing tin
	of very poor quality; flimsy
	thin and metallic in sound; lacking resonance

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