motivative vs motive

motivative is not a noun while motive is a noun.

Word	Noun	Adjective	Verb	Adverb
motivative	No	Yes	No	No
motive	Yes	Yes	No	No

As adjectives, motivative and motive are synonyms defined as:

Other synonyms of motivative include motivating.

motivative (noun)	motive (noun)
	the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior
	a design or figure that consists of recurring shapes or colors, as in architecture or decoration
	a theme that is repeated or elaborated in a piece of music

motivative (adjective)	motive (adjective)
impelling to action	causing or able to cause motion
	impelling to action