There are a total of 1357 8-letter words starting with the letter 'o', and the number may vary in different dictionaries. You can specify the dictionary and order.
- overkill 18
- optician 15
- ossicles 12
- oliguria 12
- oilcloth 15
- osteitis 8
- outfield 14
- outlawry 15
- obtusely 15
- oblation 13
- overheat 14
- overrode 13
- overmuch 21
- olympiad 18
- outfalls 14
- oximetry 20
- outcries 12
- oleander 11
- orgasmic 16
- overused 14
- overshot 14
- overawed 16
- orchitis 13
- outgroup 15
- outpaced 16
- ohmmeter 16
- obelisks 16
- oftenest 12
- overripe 15
- otoliths 11
- oxidases 16
- oxymoron 21
- overstep 15
- overhand 16
- opposers 14
- orthosis 10
- opossums 15
- orthotic 13
- oligomer 14
- olefinic 16
- omelette 12
- overplus 17
- oviducts 17
- oversold 14
- oxalates 16
- openwork 19
- odontoid 11
- outsized 19
- outshine 12
- ochreous 14
- optionee 12
- oxidised 17
- optative 15
- ostinato 9
- overleaf 16
- outsides 10
- overlong 16
- oximeter 18
- overrate 12
- outshone 12
- ornately 12
- oldsters 10
- outflank 18
- optioned 13
- overages 14
- outvoted 14
- outstand 11
- orthoses 10
- obtruded 14
- orbiters 11
- obliquus 23
- obligees 14
- oculists 13
- opsonins 13
- ordinals 11
- ovations 13
- operably 17
- odorants 10
- outworks 16
- outsmart 12
- outlasts 10
- offerees 14
- obduracy 18
- overfill 17
- oviposit 15
- obliques 22
- onstream 12
- ouvrages 12
- oxytocic 23
- overbite 15
- outranks 14
- oersteds 9
- oxazepam 30
- optimise 14
- opuscula 17
- occludes 17
- overcook 19
- otologic 11
- olivines 14
- ocotillo 13
- outstate 9
- orthicon 14
- othering 13
- outlives 14
- oiliness 10
- oospores 11
- overwash 17
- ototoxic 18
- orpiment 15
- outdoing 13
- overpack 22
- ocherous 14
- ovulated 15
- oestrous 9
- oogonium 15
- overfeed 16
- outgrows 14
- oldstyle 13
- ozonized 28
- oologist 11
- oliguric 15
- otoscope 14
- outtakes 13
- oerlikon 12
- overdraw 16
- oilskins 14
- omnivore 16
- ostracod 12
- octoroon 12
- oncidium 17
- opercula 16
- origanum 15
- oldtimer 13
- overwrap 18
- overstay 14
- oneworld 14
- outports 12
- octagons 14
- oligarch 16
- obtrudes 13
- offprint 18
- ottering 9
- occluder 13
- openable 16
- ouvriers 11
- overbear 15
- orangery 13
- oddments 14
- ovenbird 17
- occulted 17
- overside 13
- overleap 16
- ovaritis 12
- opencast 15
- olivette 13
- oiticica 14
- organdie 12
- oxalated 17
- opponens 16
- outcaste 12
- outspent 13
- oversell 14
- overfall 17
- omohyoid 17
- overfull 18
- omphalos 17
- obtunded 15
- outremer 10
- outpaces 15
- osteomas 11
- oversoul 14
- obligato 14
- overplay 18
- overgrow 17
- overaged 15
- overtops 15
- odontoma 11
- oilstone 10
- osnaburg 15
- olefines 13
There are 1357 8-letter words starting with the letter o in the well-known word game dictionary, 1046 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 1299 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 1063 in the Words with Friends (WWF) dictionary.
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