fact
noun
1 it is a fact that the water supply is seriously polluted:
reality, actuality, certainty, factuality, certitude;
truth, naked truth, verity, gospel.
▷antonyms lie; fiction.
2 every fact in the report was double-checked:
detail, piece of information, particular, item, specific, element, point, factor, feature, characteristic, respect, ingredient, attribute, circumstance, consideration, aspect, facet;
(facts) information, itemized information, whole story;
informal info, low-down, score, dope;
British, informal gen.
3 he was charged with being an accessory after the fact:
event, happening, occurrence, incident, act, deed.
fact Oxford Dictionary of English