O — oa ob oc od oe of og oh oi ok ol om on oo op or os ot ou ov ow ox oy oz
oaf |əʊf| — an awkward stupid person
oafish |ˈəʊfɪʃ| — ill-mannered and coarse and contemptible in behavior or appearance
oak |əʊk| — the hard durable wood of any oak; used especially for furniture and flooring
oak-apple |ˈəʊk æpəl| — Oak gall.
oak-tree |triː| — A tree of the genus Quercus, bearing acorns and having lobed leaves.
oaken |ˈəʊkən| — consisting of or made of wood of the oak tree
oakley |ˈɒklɪ| — United States sharpshooter who was featured in Buffalo Bill's Wild West Show (1860-1926)
oakling |ˈəʊklɪŋ| — A young oak tree.
oakum |ˈəʊkəm| — loose hemp or jute fiber obtained by unravelling old ropes; when impregnated with tar it was used to caulk seams and pack joints in wooden ships
oakwood |ˈɒˌkwʊd| — A wood populated with oak trees.
oaky |ˈəʊkɪ| — Describing the taste of wine that has been aged in oak and acquired tannins from the wood.
oar |ɔːr| — an implement used to propel or steer a boat
oarage |ˈɔːrɪdʒ| — (archaic) The act of using oars; rowing.
oared |ˈɔːrd| — Having oars.
oarlock |ˈɔːrlɑːk| — a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing
oarsman |ˈɔːrzmən| — someone who rows a boat
oarsmanship |ˈɔːrzmənʃɪp| — skill as an oarsman
oases |əʊˈeɪsiːz| — plural form of oasis
oasis |əʊˈeɪsɪs| — a fertile tract in a desert (where the water table approaches the surface)
oast |əʊst| — a kiln for drying hops
oast-house |ˈəʊst haʊs| — (UK) a building containing oasts, used in conjunction with hop harvesting.
oat |əʊt| — annual grass of Europe and North Africa; grains used as food and fodder (referred to primarily in the plural: `oats')
oatcake |ˈəʊtkeɪk| — thin flat unleavened cake of baked oatmeal
oaten |ˈəʊtn| — of or related to or derived from oats
oath |əʊθ| — profane or obscene expression usually of surprise or anger
oatmeal |ˈəʊtmiːl| — porridge made of rolled oats
oats |əʊts| — plural form of oat