magic spell vs whammy

magic spell and whammy both are nouns.

Word	Noun	Adjective	Verb	Adverb
magic spell	Yes	No	No	No
whammy	Yes	No	No	No

As nouns, whammy is a hyponym of magic spell; that is, whammy is a word with a more specific, narrower meaning than magic spell:

Other hyponyms of magic spell include conjuration, incantation, curse, hex, jinx, hocus-pocus.

magic spell (noun)	whammy (noun)
a verbal formula believed to have magical force	an evil spell
	a serious or devastating setback