determinative vs deciding

determinative and deciding both are nouns.

Word	Noun	Adjective	Verb	Adverb
determinative	Yes	Yes	No	No
deciding	Yes	Yes	No	No

As adjectives, determinative and deciding are synonyms defined as:

Other synonyms of determinative include determinant, determining.

determinative (noun)	deciding (noun)
a determining or causal element or factor	the cognitive process of reaching a decision
one of a limited class of noun modifiers that determine the referents of noun phrases

determinative (adjective)	deciding (adjective)
having the power or quality of deciding	having the power or quality of deciding