indetermination vs indeterminacy

indetermination and indeterminacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
indetermination	Yes	No	No	No
indeterminacy	Yes	No	No	No

As nouns, indetermination and indeterminacy are synonyms defined as:

indetermination and indeterminacy: the quality of being vague and poorly defined

Other synonyms of indetermination include indefiniteness, indefinity, indeterminateness.

indetermination (noun)	indeterminacy (noun)
the quality of being vague and poorly defined	the quality of being vague and poorly defined