incantation vs magic spell

incantation and magic spell both are nouns.

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

As nouns, magic spell is a hypernym of incantation; that is, magic spell is a word with a broader meaning than incantation:

incantation: a ritual recitation of words or sounds believed to have a magical effect
magic spell: a verbal formula believed to have magical force

Other hypernyms of incantation include charm, magical spell, spell.

incantation (noun)	magic spell (noun)
a ritual recitation of words or sounds believed to have a magical effect	a verbal formula believed to have magical force