There are several synonyms for the word "finative" which convey a similar meaning. One such synonym is "conclusive", which denotes something that settles a matter or ends a debate. Another term that can be used interchangeably is "definitive", which signifies an ultimate or unquestionable conclusion. Additionally, the word "decisive" can serve as a synonym, characterizing a firm and clear resolution. Moreover, "terminal" is a synonym for "finative" as it suggests the finality of an outcome or conclusion. These synonyms emphasize the defining, concluding, and settling aspects of the word "finative", providing alternative options to express the notion of something being ultimate and conclusive.