bummer vs annoyance

bummer and annoyance both are nouns.

Word	Noun	Adjective	Verb	Adverb
bummer	Yes	No	No	No
annoyance	Yes	No	No	No

As nouns, annoyance is a hypernym of bummer; that is, annoyance is a word with a broader meaning than bummer:

Other hypernyms of bummer include botheration, irritation, vexation.

bummer (noun)	annoyance (noun)
an experience that is irritating or frustrating or disappointing	the act of troubling or annoying someone
a bad reaction to a hallucinogenic drug	something or someone that causes trouble; a source of unhappiness
	anger produced by some annoying irritation
	an unpleasant person who is annoying or exasperating
	the psychological state of being irritated or annoyed