- (n) O; o[edict]
- (n) ogre; (P)[edict]
- (n) (1) oak; (2) orc; (P)[edict]
- (n,vs) order; (P)[edict]
- (n) oat (Avena sativa); oats[edict]
- (n) (1) auto; automobile; automatic; (2) oat; oats; (P)[edict]
- (n) ode; (P)[edict]
- (n) owner; (P)[edict]
- (n) orb[edict]
- (n) Ohm[edict]
- (n) aura; (P)[edict]
- (n) (1) oar; (2) (See オールA) all; (3) (sl) staying up all night long; (P)[edict]
- (n) {comp} OLE[edict]