- oad ... obdureness
- obeah ... objected
- objectify ... obliquation
- oblique ... obscurantism
- obscurantist ... obsignatory
- obsolesce ... obtension
- obtest ... occasion
- occasionable ... ocean
- oceanic ... octandrous
- octane ... octostyle
- octosyllabic ... odometrous
- odometry ... oelet
- oenanthate ... officeholder
- officer ... ogreish
- ogreism ... oleaster
- oleate ... oligosepalous
- oligosiderite ... omissive
- omit ... omostegite
- omosternal ... onerously
- ones ... onychophora
- onyx ... oozoa
- oozy ... opercle
- opercula ... ophthalmometer
- ophthalmoscope ... opisthography
- opisthomi ... oppression
- oppressive ... opuscula
- opuscule ... orbiculate
- orbiculated ... ordainable
- ordained ... oreosoma
- oreweed ... organy
- organzine ... originator
- orillon ... ornithotomist
- ornithotomy ... orthoclase
- orthoclastic ... orthorhombic
- orthoscope ... oscinian
- oscinine ... ossein
- osselet ... osteocranium
- osteodentine ... ostracized
- ostracizing ... otopathy
- otoscope ... outagamies
- outargue ... outdare
- outdated ... outgoes
- outgoing ... outlope
- outluster ... outride
- outrider ... outspring
- outstand ... outwin
- outwind ... overawful
- overawing ... overcostly
- overcount ... overfill
- overfish ... overground
- overgrow ... overlain
- overland ... overmanner
- overmarch ... overply
- overpoise ... overrigid
- overrigorous ... oversleep
- overslide ... oversway
- overswell ... overvote
- overwalk ... oviparity
- oviparous ... owner
- ownerless ... oxidate
- oxidated ... oxygenizing
- oxygenous ... ozonometer
- ozonometric ... ozonous
Dictionary
English - Japanese