- obduratenesses20
- objectlessness31
- obligingnesses24
- obsequiousness29
- obsoletenesses19
- obstreperously24
- obstructionism25
- obstructionist22
- occidentalized33
- occidentalizes32
- occupationally29
- oceanographers25
- oceanographies25
- octodecillions24
- odontoglossums23
- oleaginousness20
- oleomargarines21
- oligopsonistic24
- ombudsmanships31
- omnicompetence31
- omphaloskepses30
- omphaloskepsis30
- onchocerciases26
- onchocerciasis26
- oncogenicities24
- oncornaviruses24
- onomatologists21
- oophorectomies25
- openhandedness24
- operationalism22
- operationalist19
- ophthalmologic31
- ophthalmoscope31
- ophthalmoscopy33
- opinionatively26
- opisthobranchs28
- opposabilities24
- oppositenesses21
- oppositionists21
- oppressiveness25
- optimistically27
- optoelectronic25
- orchestrations20
- ordinarinesses17
- organismically27
- organizational28
- organochlorine24
- organometallic25
- ornamentations20
- ornithischians23
- ornithological24
- ornithologists20
- orthochromatic27
- orthogonalized30
- orthogonalizes29
- orthographical27
- orthomolecular25
- orthopedically27
- orthophosphate26
- oscillographic29
- osmoregulation22
- osmoregulatory23
- ostentatiously19
- osteoarthritic19
- osteoarthritis16
- osteosarcomata20
- otolaryngology25
- outdatednesses18
- outgoingnesses21
- outlandishness21
- outmaneuvering27
- outmanipulated25
- outmanipulates24
- outpoliticking29
- outrageousness19
- outreproducing26
- outsidernesses17
- ovariectomized34
- overabstracted25
- overabundances28
- overaccentuate26
- overactivities25
- overadjustment33
- overadvertised24
- overadvertises23
- overaggressive26
- overanalytical26
- overarticulate23
- overassertions19
- overassessment22
- overattentions20
- overbreathings26
- overcapacities27
- overcapitalize34
- overcautioning26
- overcentralize32
- overclassified26
- overclassifies25
- overcommitment31
- overcommitting30