determinative vs determining

determinative is a noun but determining is not a noun.

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

As adjectives, determinative and determining are synonyms defined as:

Other synonyms of determinative include deciding, determinant.

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

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