O (Thiruvananthapuram) Ottūr (Thiruvananthapuram) Onivāram (Thiruvananthapuram) Onampalli (Thiruvananthapuram) Oranallūr (Kollam) Oyūr (Kollam) Odanāvattam (Kollam) Orkkod (Thiruvananthapuram) Odetti (Pattanamtitta) Olikkal (Pattanamtitta) Omallūr (Coimbatore) Orakaliyūrkumārapuram (Coimbatore) Odaiyakulam (Palakkad district) Oddansahlai (Palakkad district) Odugampallampudūr (Palakkad district) Odumbumedu (Palakkad district) Orukumbankutti (Katihar) Oksha (Palakkad district) Oduvangād (Ernākulam) Okkal (Thrissur District) Orlassheri (Thrissur District) Olakara (Thrissur District) Ollukara (Thrissur District) Ottupāra (Thrissur District) Oozhathum Kadava (Ernākulam) Oravanturutu (Thrissur District) Orumanayūr (Malappuram) Othalūr (Palakkad district) Othalūr Ō (Palakkad district) Ōdanūr (Malappuram) Ōdamala 17 18 19 20 21