11-letter words starting with O
There are 591 eleven-letter words starting with O in our dictionary. The most common are OBSERVATION, OPERATIONAL, OPPORTUNITY, ORIENTATION and OUTSTANDING.
Every word here is exactly 11 letters long and begins with O. Handy when you know the first letters and the length, as in crosswords and Wordle-style puzzles.
11-letter words starting with O
- observation16
- operational13
- opportunity18
- orientation11
- outstanding13
- objectively28
- objectivity28
- obligations14
- obliterated14
- observatory19
- obstructing16
- obstruction15
- occupations17
- occurrences17
- officiating20
- organically17
- originality15
- originating13
- outnumbered16
- outsourcing14
- overarching20
- overcrowded21
- overflowing21
- overheating18
- overlapping19
- overlooking19
- overpowered20
- overwhelmed23
- obfuscating19
- obfuscation18
- objectified26
- objectifies25
- objectivism27
- objectivist25
- obliterates13
- obliviously19
- obnoxiously23
- obscenities15
- obscuration15
- obscurities15
- observables18
- observances18
- obsessional13
- obsessively19
- obsolescent15
- obstetrical15
- obstinately16
- obstructive18
- obviousness16
- occasioning16
- occultation15
- occupancies19
- offensively23
- offhandedly25
- officialdom22
- oligarchies17
- oligopolies14
- omnipotence17
- omnipresent15
- omniscience17
- oncogenesis14
- oncological16
- oncologists14
- ontogenetic14
- ontological14
- opalescence17
- operability18
- operatively19
- opinionated14
- opportunism17
- opportunist15
- oppositions15
- oppressions15
- optionality16
- optometrist15
- orchestrate16
- orderliness12
- ordinations12
- orientalism13
- orientalist11
- origination12
- originators12
- ornamentals13
- ornithology18
- orthodontic17
- orthodoxies22
- orthography23
- orthonormal16
- orthopaedic19
- orthopedics19
- orthopedist17
- orthostatic16
- oscillating14
- oscillation13
- oscillators13
- oscillatory16
- osmotically18
- ostentation11
- osteoblasts13
- osteoclasts13
- osteopathic18
- ostracizing23
- outbuilding15
- outclassing14
- outcompeted18
- outcropping18
- outdoorsman14
- outdoorsmen14
- outfielders15
- outflanking19
- outmaneuver16
- outpatients13
- outperforms18
- outpourings14
- outshooting15
- outsmarting14
- outspending15
- outspokenly20
- outstripped16
- outweighing19
- overanalyze26
- overbearing17
- overbooking21
- overcharged21
- overcharges20
- overcooking21
- overdressed16
- overexcited24
- overexposed24
- overfeeding19
- overfilling18
- overfishing21
- overflights21
- overgrazing25
- overhanging19
- overhauling18
- overhearing18
- overindulge16
- overloading16
- overmatched22
- overnighter18
- overpayment21
- overplaying20
- overpricing19
- overprinted17
- overproduce19
- overreached20
- overreacted17
- overrunning15
- overselling15
- overshadows21
- overstaffed21
- overstating15
- overstaying18
- overstepped19
- overstocked21
- overstretch19
- overstuffed21
- overtopping19
- overturning15
- overvaluing18
- overvoltage18
- overweening18
- overworking22
- overwriting18
- overwritten17
- overwrought21
- overzealous23
- oviposition16
- oxygenating23
- oxygenation22
- oarsmanship18
- obfuscatory21
- obituarists13
- objurgating22
- objurgation21
- objurgatory24
- obliqueness22
- obliquities22
- obliterator13
- obnubilated16
- obnubilates15
- obscurantic17
- obscureness15
- observantly19
- observingly20
- obsolescing16
- obstinacies15
- obstructors15
- obtainments15
- obtrusively19
- obturations13
- occipitally20
- oceanariums15
- oceanfronts16
- ochlocratic20
- octagonally17
- octahedrons17
- octapeptide18
- odontoblast14
- odoriferous15
- odorousness12
- oecumenical17
- offenseless17
- offertories17
- officialese19
- officialism21
- officiaries19
- officiation19
- officiously22
- offprinting20
- offscouring20
- oligochaete17
- oligoclases14
- ominousness13
- omnifarious16
- omnipotents15
- oncogeneses14
- oneirically16
- oneiromancy18
- onerousness11
- ongoingness13
- onomatology17
- ontogeneses12
- ontogenesis12
- ontologists12
- openability18
- openhearted17
- openmouthed19
- operagoings15
- operculated16
- operettists13
- operoseness13
- ophthalmias21
- opportunely18
- opprobrious17
- opprobriums19
- opsonifying20
- optokinetic19
- optometries15
- oracularity16
- orangewoods16
- orbicularly18
- orchardists17
- ordainments14
- ordinariest12
- ordonnances14
- organicisms16
- organicists14
- organizable23
- orientalize20
- orientating12
- originative15
- ornamenting14
- ornithopods17
- ornithopter16
- orographies17
- orphanhoods20
- orthocenter16
- orthoclases16
- orthodontia15
- orthoepists16
- orthopteran16
- orthoscopic20
- oscillogram16
- osculations13
- osmiridiums16
- osmometries15
- ostensively17
- ostensorium13
- osteologies12
- osteologist12
- osteoplasty16
- ostracising14
- ostracoderm16
- ostrichlike20
- othernesses14
- otherwhiles20
- otherworlds18
- ototoxicity23
- outachieved20
- outachieves19
- outbalanced16
- outbalances15
- outbargains14
- outbitching19
- outbleating14
- outblessing14
- outblooming16
- outbluffing20
- outblushing17
- outboasting14
- outbragging16
- outbrawling17
- outbreeding15
- outbullying17
- outcapering16
- outcatching19
- outcaviling17
- outcavilled17
11-letter words starting with O…
Other lengths starting with O
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