whammy vs black eye

whammy and black eye both are nouns.

Word	Noun	Adjective	Verb	Adverb
whammy	Yes	No	No	No
black eye	Yes	No	No	No

As nouns, black eye is a hypernym of whammy; that is, black eye is a word with a broader meaning than whammy:

whammy: a serious or devastating setback
black eye: an unfortunate happening that hinders or impedes; something that is thwarting or frustrating

Other hypernyms of whammy include blow, reversal, reverse, setback.

whammy (noun)	black eye (noun)
an evil spell	an unfortunate happening that hinders or impedes; something that is thwarting or frustrating
a serious or devastating setback	a swollen bruise caused by a blow to the eye
	a bad reputation