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

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