kefEnglishMerriam-Webster Dictionary 2) as in concept, conceptionSynonyms & Near Synonyms abstraction, concept, conceptionfeeling, hunch, impression, inkling, notion, suspicionproffer, proposal, suggestionconjecture, generalization, guess, guesswork, inference, speculation, surmiseassumption, concession, premise (also premiss), presumption, presupposition, theoremhypothesis, proposition, supposition, theory, thesisAntonyms & Near Antonyms assurance, certainty, fact, knowledge