Words with Letters: o p i n i o n opinion 9:0pinion 8:1inion 5:2onion 5:3pinon 7:4noon 4:5pion 6:6poon 6:7inn 3:8ion 3:9nip 5:10noo 3:11ono 3:12pin 5:13poi 5:14poo 5:15in 2:16no 2:17oi 2:18on 2:19op 4:20pi 4:21