deciding vs turnaround

deciding and turnaround both are nouns.

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

As nouns, turnaround is a hyponym of deciding; that is, turnaround is a word with a more specific, narrower meaning than deciding:

deciding (noun)	turnaround (noun)
the cognitive process of reaching a decision	turning in the opposite direction
	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

deciding (adjective)	turnaround (adjective)
having the power or quality of deciding