nail down vs win

nail down is not a noun while win is a noun.

Word	Noun	Adjective	Verb	Adverb
nail down	No	No	Yes	No
win	Yes	No	Yes	No

As verbs, win is a hypernym of nail down; that is, win is a word with a broader meaning than nail down:

Other hypernyms of nail down include bring home the bacon, come through, deliver the goods, succeed.

nail down (noun)	win (noun)
	a victory (as in a race or other competition)
	something won (especially money)

nail down (verb)	win (verb)
make final; put the last touches on; put into final form	be the winner in a contest or competition; be victorious
define clearly	obtain advantages, such as points, etc.
succeed in obtaining a position	win something through one's efforts
	acquire or deserve by one's efforts or actions
	attain success or reach a desired goal