turnabout vs turnaround

turnabout and turnaround both are nouns.

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

As nouns, turnabout and turnaround are synonyms defined as:

Other synonyms of turnabout include reversal, reverse, reversion.

As nouns, turnabout and turnaround are synonyms defined as:

Other synonyms of turnabout include change of mind, flip-flop, reversal.

turnabout (noun)	turnaround (noun)
turning in the opposite direction	turning in the opposite direction
a decision to reverse an earlier decision	act or process of unloading and loading and servicing a vessel or aircraft for a return trip
	an area sufficiently large for a vehicle to turn around
	a decision to reverse an earlier decision
	time need to prepare a vessel or ship for a return trip