Liar

(n.) A person who knowingly utters falsehood; one who lies.

Thesaurus Entries

Ananias, Baron Munchausen, Father of Lies, Satan, Sir John Mandeville, consummate liar, dirty liar, equivocator, fabricator, fabulist, false witness, falsifier, fibber, fibster, habitual liar, mythomaniac, palterer, pathological liar, perjurer, prevaricator, pseudologist, pseudologue, spinner of yarns, storyteller, teller of tales, yarn spinner, yarner