penology vs poenology

penology and poenology both are nouns.

Word	Noun	Adjective	Verb	Adverb
penology	Yes	No	No	No
poenology	Yes	No	No	No

As nouns, penology and poenology are synonyms defined as:

penology and poenology: the branch of criminology concerned with prison management and prisoner rehabilitation

penology (noun)	poenology (noun)
the branch of criminology concerned with prison management and prisoner rehabilitation	the branch of criminology concerned with prison management and prisoner rehabilitation