cryogenics vs cryogeny

cryogenics and cryogeny both are nouns.

Word	Noun	Adjective	Verb	Adverb
cryogenics	Yes	No	No	No
cryogeny	Yes	No	No	No

As nouns, cryogenics and cryogeny are synonyms defined as:

cryogenics and cryogeny: the branch of physics that studies the phenomena that occur at very low temperatures

cryogenics (noun)	cryogeny (noun)
the branch of physics that studies the phenomena that occur at very low temperatures	the branch of physics that studies the phenomena that occur at very low temperatures