decisive factor vs determiner

decisive factor and determiner both are nouns.

Word	Noun	Adjective	Verb	Adverb
decisive factor	Yes	No	No	No
determiner	Yes	No	No	No

As nouns, determiner is a hypernym of decisive factor; that is, determiner is a word with a broader meaning than decisive factor:

decisive factor: a point or fact or remark that settles something conclusively
determiner: a determining or causal element or factor

Other hypernyms of decisive factor include causal factor, determinant, determinative, determining factor.

decisive factor (noun)	determiner (noun)
a point or fact or remark that settles something conclusively	a determining or causal element or factor
	one of a limited class of noun modifiers that determine the referents of noun phrases
	an argument that is conclusive