Difference between Decisive and Determinative

DECISIVE vs DETERMINATIVE: NOUN

A determining or causal element or factor
One of a limited class of noun modifiers that determine the referents of noun phrases
A determining factor.
That which determines or indicates the character or quality of something else.
In grammar, a determinative or demonstrative word.
That which serves to determine.
An ideogram used to mark semantic categories of words in logographic scripts.

Characterized by decision and firmness
Unmistakable
Forming or having the nature of a turning point or crisis
Settling a matter or conflict; conclusive:
Characterized by or showing the ability to make decisions quickly and firmly; resolute.
Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.
Marked by promptness and decision.
Determining or having the power to determine an outcome

Having the power or quality of deciding
Able or serving to determine: : decisive.
Having power to determine; limiting; shaping; directing; conclusive.
Tables presenting the specific character of minerals, plants, etc., to assist in determining the species to which a specimen belongs.
Determining (deciding) something.

Having the power or quality of determining a question, doubt, contest, event, etc.; final; conclusive; putting an end to controversy: as, the opinion of the court is decisive on the question.
Marked by decision or prompt determination.

Of use in ascertaining the species; serving to determine the precise kind of a thing: as, determinative tables in the natural sciences (that is, tables arranged for determining the specific character of minerals, plants, etc., and to assist in assigning them to their species); determinative signs in hieroglyphics; determinative ornaments or structures.
Having power to determine, fix, or decide; tending or serving to shape or direct; conclusive.

Pivotal, Peremptory, Determinant, Determining, Fatal, Unhesitating, Conclusive, Determinative, Definite, Fateful, Important, Deciding, Critical, Resolute, Crucial

Key, Determined, Predicate, Pivotal, Influencing, Defining, Conclusive, Determining factor, Causal factor, Deciding, Decisive, Crucial, Determining, Determinant, Determiner

Forceful, Pivotal, Peremptory, Determinant, Fatal, Unhesitating, Conclusive, Determinative, Definite, Fateful, Important, Deciding, Critical, Resolute, Crucial

Overarching, Vital, Undecided, Key, Determined, Predicate, Pivotal, Influencing, Defining, Conclusive, Deciding, Decisive, Crucial, Determinant, Determiner

This approach is unrivalled and has decisive advantages.
China by adopting a more decisive retaliatory policy.
MIRVs run free, but they were hardly decisive.
The crowning point, most important element, decisive factor.
Second, it should provide satisfying, decisive, psychological closure.
All are actions of a decisive decision maker.
The bargaining strength is not of decisive effect.
Your budget will be an important decisive factor.
Know how to be decisive and fail fast.
Doctrine identifies two similar operational design elements; the decisive condition and the decisive point.