Synonyms to premiss

hypothesis, a priori principle, affirmation, apriorism, assertion, assumed position, assumption, axiom, basis, categorical proposition, conjecture, data, first principles, foundation, ground, guesswork, hypothesis ad hoc, inference, lemma, major premise, minor premise, philosopheme, philosophical proposition, position, postulate, postulation, postulatum, premise, presumption, presupposal, presupposition, proposition, propositional function, set of postulates, speculation, statement, sumption, supposal, supposing, supposition, surmise, theorem, theory, thesis, truth table, truth-function, truth-value, working hypothesis, ancestor, antecedent, argue, assert, assume, avant-propos, basis for belief, body of evidence, breakthrough, chain of evidence, clue, datum, documentation, evidence, exhibit, exordium, fact, facts, forerunner, foreword, front matter, frontispiece, grounds, grounds for belief