turnabout vs reversion

turnabout and reversion both are nouns.

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

As nouns, turnabout and reversion are synonyms defined as:

Other synonyms of turnabout include reversal, reverse, turnaround.

turnabout (noun)	reversion (noun)
turning in the opposite direction	a failure to maintain a higher state
a decision to reverse an earlier decision	turning in the opposite direction
	returning to a former state
	(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)