outstanding vs undischarged

outstanding and undischarged both are adjectives.

Word	Noun	Adjective	Verb	Adverb
outstanding	No	Yes	No	No
undischarged	No	Yes	No	No

As adjectives, outstanding and undischarged are synonyms defined as:

Other synonyms of outstanding include owing.

outstanding (adjective)	undischarged (adjective)
having a quality that thrusts itself into attention	still capable of exploding or being fired
of major significance or importance	owed as a debt
distinguished from others in excellence
owed as a debt