win vs nail down

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

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

As verbs, nail down is a hyponym of win; that is, nail down is a word with a more specific, narrower meaning than win:

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

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