article of faith vs tenet

article of faith and tenet both are nouns.

Word	Noun	Adjective	Verb	Adverb
article of faith	Yes	No	No	No
tenet	Yes	No	No	No

As nouns, tenet is a hypernym of article of faith; that is, tenet is a word with a broader meaning than article of faith:

article of faith: (Christianity) any of the sections into which a creed or other statement of doctrine is divided
tenet: a religious doctrine that is proclaimed as true without proof

Other hypernyms of article of faith include dogma.

article of faith (noun)	tenet (noun)
an unshakable belief in something without need for proof or evidence	a religious doctrine that is proclaimed as true without proof
(Christianity) any of the sections into which a creed or other statement of doctrine is divided