A reliable generality
reality, actuality, certainty, truth, substantiality, palpability, experience, matter, state of things, truth of the matter, the case, not an illusion, fait accompli (French), what really happened, something concrete, what is the case, matter of fact, hard evidence, hard fact, nuda veritas (Latin), verity, naked truth, gospel, certitude, scripture, law, solidity, permanence, basis, physical reality, existence, corporeal existence, state of being, fact of life, what's what*, straight dope*, bottom line*; see also facts.
Antonyms fancy*, fiction, imagination.
An individual reality
circumstance, detail, factor, particular, case, consideration, datum, evidence, point, event, action, deed, happening, occurrence, creation, manifestation, being, entity, experience, affair, act, episode, performance, proceeding, phenomenon, incident, thing done, adventure, transaction, organism, construction, truism, truth, plain fact, accomplishment, accomplished fact, fait accompli (French).
Antonyms error*, illusion, untruth.