There are in total 272 words starting with the letter O and 5 letters in length. Word Length oaked 5 oaken 5 oaker 5 oakum 5 oared 5 oases 5 oasis 5 oasts 5 oaten 5 oater 5 oaths 5 oaves 5 obang 5 obeah 5 obeli 5 obese 5 obeys 5 obias 5 obied 5 obiit 5 obits 5 objet 5 oboes 5 obole 5 oboli 5 obols 5 occam 5 occur 5 ocean 5 ocher 5 oches 5 ochre 5 ochry 5 ocker 5 ocrea 5 octad 5 octal 5 octan 5 octas 5 octet 5 octyl 5 oculi 5 odahs 5 odals 5 odder 5 oddly 5 odeon 5 odeum 5 odism 5 odist 5 odium 5 odors 5 odour 5 odyle 5 odyls 5 ofays 5 offal 5 offed 5 offer 5 offie 5 oflag 5 often 5 ofter 5 ogams 5 ogeed 5 ogees 5 oggin 5 ogham 5 ogive 5 ogled 5 ogler 5 ogles 5 ogmic 5 ogres 5 ohias 5 ohing 5 ohmic 5 ohone 5 oicks 5 oidia 5 oiled 5 oiler 5 oinks 5 oints 5 ojime 5 okapi 5 okays 5 okehs 5 okies 5 okras 5 okrug 5 oktas 5 olden 5 older 5 oldie 5 oleic 5 olein 5 olent 5 oleos 5 oleum 5 oligo 5 olios 5 olive 5 ollas 5 ollav 5 oller 5 ollie 5 ology 5 olpae 5 olpes 5 omasa 5 omber 5 ombre 5 ombus 5 omega 5 omens 5 omers 5 omits 5 omlah 5 omovs 5 omrah 5 oncer 5 onces 5 oncet 5 oncus 5 ondes 5 onely 5 oners 5 onery 5 onion 5 onium 5 onkus 5 onlay 5 onned 5 onsen 5 onset 5 ontic 5 oobit 5 oohed 5 oojah 5 oomph 5 oonts 5 ooped 5 oorie 5 ooses 5 ootid 5 oozed 5 oozes 5 opahs 5 opals 5 opens 5 opepe 5 opera 5 opine 5 oping 5 opium 5 oppos 5 opsin 5 opted 5 opter 5 optic 5 orach 5 oracy 5 orals 5 orang 5 orant 5 orate 5 orbat 5 orbed 5 orbit 5 orcas 5 orcin 5 order 5 ordos 5 oread 5 orfes 5 organ 5 orgia 5 orgic 5 orgue 5 oribi 5 oriel 5 origo 5 orixa 5 orles 5 orlon 5 orlop 5 ormer 5 ornis 5 orpin 5 orris 5 ortho 5 orval 5 orzos 5 oscar 5 oshac 5 osier 5 osmic 5 osmol 5 ossia 5 ostia 5 otaku 5 otary 5 other 5 ottar 5 otter 5 ottos 5 oubit 5 oucht 5 ouens 5 ought 5 ouija 5 oulks 5 oumas 5 ounce 5 oundy 5 oupas 5 ouped 5 ouphe 5 ouphs 5 ourie 5 ousel 5 ousts 5 outby 5 outdo 5 outed 5 outer 5 outgo 5 outie 5 outre 5 outro 5 outta 5 ouzel 5 ouzos 5 ovals 5 ovary 5 ovate 5 ovels 5 ovens 5 overs 5 overt 5 ovine 5 ovist 5 ovoid 5 ovoli 5 ovolo 5 ovule 5 owche 5 owies 5 owing 5 owled 5 owler 5 owlet 5 owned 5 owner 5 owres 5 owrie 5 owsen 5 oxbow 5 oxers 5 oxeye 5 oxide 5 oxids 5 oxies 5 oxime 5 oxims 5 oxlip 5 oxter 5 oyers 5 ozeki 5 ozone 5 ozzie 5