cryogeny vs cryogenics

cryogeny and cryogenics both are nouns.

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

As nouns, cryogeny and cryogenics are synonyms defined as:

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

cryogeny (noun)	cryogenics (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