congelation vs solidification

congelation and solidification both are nouns.

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

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

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

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

congelation (noun)	solidification (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