Omonimho (yun. yotbz — yakkhela va bputa — nom) , kalimahoe, ki az jihati talaffuz va sokht ba ham monand buda, manohoi gunogun dorand. Dar zabon yakchand rohi paydoishi Omonimho vujud dorad. Masalan, kalimahoe ba yakdigar omonim meshavand, ki yagon umumiyati manoi nadorand: shast — raqam, shast — asbobi mohigiri, Guruhi digari Omonimho, ki ba masalai sermanoii kalima dakhl dorand, dar natijai inkishofi manoi kalima paydo meshavand: dam — vaqt; dam — ovoz, sado; dam —asbobi ohangari.
Rodi digari paydoishi Omonimho ba ham muvofiq omadani kalimahoi iqtibosi va kalimahoi mamulii zabon ast. Masalan, tok (toki angur, toki elektr). Omofonho — kalimahoi talaffuzashon yakkhela, vale navishtashon gunogun (tup, tub — dar du tup talaffuz meshavand), omografho — kalimahoi az jihati navisht yakkhela, vale az rui talaffuz gunogun (suzon — feli farmoish, suzon — obi suzon — sifat) ba Omonimho dakhl dorand.