- Octofoil Noun
- Octogenarian Adj Noun
- Octogynous Adj
- Octoic Adj
- Octonary Adj Noun
- Octopartite Adj
- Octophobia Noun
- Octoploid Adj Noun
- Octopod Noun
- Octopolar Adj
- Octopole Noun
- Octopus Noun
- Octoroon Noun
- Octosyllabic Adj
- Octosyllable Noun
- Octovalent Adj
- Octree Noun
- Octroi Noun
- Octroy Noun Verb
- Octuple Adj Noun Verb
- Octuplets Noun
- Octuplicate Adj Noun Verb
- Octupling Noun
- Octuply Adv
- Octyl Adj Noun
- Octylic Adj
- Octyne Noun
- Ocular Adj
- Ocularist Noun
- Ocularly Adv
- Oculist Noun
- Oculistic Adj
- Oculistics Noun
- Oculoauricular Adj
- Oculocardiac Adj
- Oculocerebrorenal Adj
- Oculocutaneous Adj
- Oculodentodigital Adj
- Oculodermal Adj
- Oculofacial Adj
- Oculogenital Adj
- Oculography Noun
- Oculogyral Adj
- Oculogyric Adj
- Oculometry Noun
- Oculomotor Noun Adj
- Oculomycosis Noun
- Oculomyodynamometry Noun
- Oculonasal Adj
- Oculopathy Noun
- Oculoplastics Noun
- Oculoplethysmography Noun
- Oculopneumoplethysmography Noun
- Oculopressor Noun
- Oculospinal Adj
- Oculovertebral Adj
- Oculus Noun
- Ocupational
- Odal Adj
- Odalisque Noun