Homonym

(n.) A word with the same pronunciation and spelling as another word, but a different meaning; as right (correct) and right (opposed to left).

Thesaurus Entries

Doppelganger, actual thing, antonym, articulation, carbon copy, copy, dead ringer, ditto, double, duplicate, equivalent, exact counterpart, expression, facsimile, free form, homograph, homophone, idem, identical same, lexeme, linguistic form, locution, logos, metonym, minimum free form, monosyllable, no other, none other, polysyllable, replica, selfsame, spit and image, spitting image, syllable, synonym, term, the same, the same difference, twin, usage, utterance, verbalism, verbum, very image, very same, vocable, word