genius vs pyrotechnics

genius and pyrotechnics both are nouns.

Word	Noun	Adjective	Verb	Adverb
genius	Yes	No	No	No
pyrotechnics	Yes	No	No	No

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

genius: unusual mental ability
pyrotechnics: (music) brilliance of display (as in the performance of music)

Other hyponyms of genius include coruscation, scintillation, savant syndrome.

genius (noun)	pyrotechnics (noun)
exceptional creative ability	the craft of making fireworks
a natural talent	(music) brilliance of display (as in the performance of music)
unusual mental ability
someone who has exceptional intellectual ability and originality
someone who is dazzlingly skilled in any field