15-Letter Words Containing: O,N,T,R,A,S,T,Y

• the formation of crystals

• a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces

• a mental synthesis that becomes fixed or concrete by a process resembling crystal formation

• in a demonstrative manner

• an amphibian of the superorder Labyrinthodontia

• Any substance (typically a polyhydric alcohol) that prevents cell damage on freezing

• capability of being demonstrated or logically proved