determining vs determinant

determining is not a noun while determinant is a noun.

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

As adjectives, determining and determinant are synonyms defined as:

Other synonyms of determining include deciding, determinative.

determining (noun)	determinant (noun)
	a determining or causal element or factor
	a square matrix used to solve simultaneous equations
	the site on the surface of an antigen molecule to which an antibody attaches itself

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