undecided vs undetermined

undecided and undetermined both are adjectives.

Word	Noun	Adjective	Verb	Adverb
undecided	No	Yes	No	No
undetermined	No	Yes	No	No

As adjectives, undecided and undetermined are synonyms defined as:

undecided and undetermined: not brought to a conclusion; subject to further thought

Other synonyms of undecided include open, unresolved.

undecided (adjective)	undetermined (adjective)
characterized by indecision	not yet having been ascertained or determined
not yet having made a commitment	not precisely determined or established; not fixed or known in advance
not brought to a conclusion; subject to further thought	not brought to a conclusion; subject to further thought