indefiniteness vs indetermination

indefiniteness and indetermination both are nouns.

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

As nouns, indefiniteness and indetermination are synonyms defined as:

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

Other synonyms of indefiniteness include indefinity, indeterminacy, indeterminateness.

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