What is another word for "notion"?

Roget's Thesaurus (1911) lists these synonyms for "notion": all, analogy, approximation, association, assumed, assumption, away, bare, belief, believing, bigotry, blind, blue, catch, cheese, childish, conceit, conclusion, condition, confident, confiding, conjecture, credo, credulity, credulous, credulousness, cullibility, dark, data, deceive, deception, delusion, divination, down, dupe, easily, estimate, father, follow, for.