incontestable vs unanswerable

incontestable and unanswerable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
incontestable	No	Yes	No	No
unanswerable	No	Yes	No	No

incontestable (adjective)	unanswerable (adjective)
incapable of being contested or disputed	impossible to answer
not open to question; obviously true