inexhaustible vs unfailing

inexhaustible and unfailing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
inexhaustible	No	Yes	No	No
unfailing	No	Yes	No	No

inexhaustible (adjective)	unfailing (adjective)
incapable of being entirely consumed or used up	tireless
that cannot be entirely consumed or used up	always able to supply more
	not liable to failure