Synonyms for Tenet:

n.

ideal, commitment, theory, concept. belief (noun)
conviction, faith, creed, certitude, doctrine, opinion, dogma, thought, postulate, philosophy, belief, trust, view, credence, principle, idea.
belief, principle (noun)
system, credo, conviction, Self-conviction, presumption, conception, position, creed, trust, view, opinion, assumption, dogma, profession, faith, doctrine, impression.
view (noun)
conception, credo, impression, profession, position, Self-conviction, study at doctrinedoctrine, presumption, system, assumption.

Other synonyms:

Other relevant words:
system, conception, commitment, profession, Self-conviction, presumption, assumption, credo, position, concept, impression, theory, ideal.