reversion vs retroversion

reversion and retroversion both are nouns.

Word	Noun	Adjective	Verb	Adverb
reversion	Yes	No	No	No
retroversion	Yes	No	No	No

As nouns, reversion and retroversion are synonyms defined as:

Other synonyms of reversion include regress, regression, retrogression.

reversion (noun)	retroversion (noun)
a failure to maintain a higher state	returning to a former state
turning in the opposite direction	translation back into the original language
returning to a former state	a turning or tilting backward of an organ or body part
(genetics) a return to a normal phenotype (usually resulting from a second mutation)
a reappearance of an earlier characteristic
(law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period (e.g., the death of the grantee)