pyrotechnic vs pyrotechny

pyrotechnic and pyrotechny both are nouns.

Word	Noun	Adjective	Verb	Adverb
pyrotechnic	Yes	Yes	No	No
pyrotechny	Yes	No	No	No

pyrotechnic (noun)	pyrotechny (noun)
(usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.	the craft of making fireworks

pyrotechnic (adjective)	pyrotechny (adjective)
of or relating to the craft of making fireworks
suggestive of fireworks