undetermined vs undecided

undetermined and undecided both are adjectives.

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

As adjectives, undetermined and undecided are synonyms defined as:

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

Other synonyms of undetermined include open, unresolved.

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