KYANITE: a blue silicate mineral.
KYANITIC
KYANISE
KYANIZE
are all also variants.
Also spelled CYANITE- which leads us to another set of words:
CYANITIC
CYANIC
CYANID
CYANIDEd
CYANIN
CYANINE
CYANATE
CYANAMID
CYANAMIDE
All the ones that don't end with C take an S.