decide vs will

decide is not a noun while will is a noun.

Word	Noun	Adjective	Verb	Adverb
decide	No	No	Yes	No
will	Yes	No	Yes	No

As verbs, will is a hyponym of decide; that is, will is a word with a more specific, narrower meaning than decide:

decide (noun)	will (noun)
	the capability of conscious choice and decision and intention
	a fixed and persistent intent or purpose
	a legal document declaring a person's wishes regarding the disposal of their property when they die

decide (verb)	will (verb)
reach, make, or come to a decision about something	determine by choice
bring to an end; settle conclusively	decree or ordain
cause to decide	leave or give by will after one's death
influence or determine