cyanite vs kyanite

cyanite and kyanite both are nouns.

Word	Noun	Adjective	Verb	Adverb
cyanite	Yes	No	No	No
kyanite	Yes	No	No	No

As nouns, cyanite and kyanite are synonyms defined as:

cyanite and kyanite: a grey or greenish-blue mineral consisting of aluminum silicate in crystalline form; occurs in metaphoric rock, used as a refractory

cyanite (noun)	kyanite (noun)
a grey or greenish-blue mineral consisting of aluminum silicate in crystalline form; occurs in metaphoric rock, used as a refractory	a grey or greenish-blue mineral consisting of aluminum silicate in crystalline form; occurs in metaphoric rock, used as a refractory