congelation vs solidifying

congelation and solidifying both are nouns.

Word	Noun	Adjective	Verb	Adverb
congelation	Yes	No	No	No
solidifying	Yes	No	No	No

As nouns, solidifying is a hypernym of congelation; that is, solidifying is a word with a broader meaning than congelation:

congelation: the process of congealing; solidification by (or as if by) freezing
solidifying: the process of becoming hard or solid by cooling or drying or crystallization

Other hypernyms of congelation include curing, hardening, set, solidification.

congelation (noun)	solidifying (noun)
the process of congealing; solidification by (or as if by) freezing	the process of becoming hard or solid by cooling or drying or crystallization