unreasonable vs untenable

unreasonable and untenable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unreasonable	No	Yes	No	No
untenable	No	Yes	No	No

unreasonable (adjective)	untenable (adjective)
not reasonable; not showing good judgment	(of theories etc) incapable of being defended or justified
beyond normal limits