effect vs bummer

effect and bummer both are nouns.

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

As nouns, bummer is a hyponym of effect; that is, bummer is a word with a more specific, narrower meaning than effect:

Other hyponyms of effect include aftereffect, side effect.

effect (noun)	bummer (noun)
an outward appearance	an experience that is irritating or frustrating or disappointing
(of a law) having legal validity	a bad reaction to a hallucinogenic drug
an impression (especially one that is artificial or contrived)
the central meaning or theme of a speech or literary work
a phenomenon that follows and is caused by some previous phenomenon
a symptom caused by an illness or a drug

effect (verb)	bummer (verb)
produce
act so as to bring into existence