English Words Starting With O
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- o'kelly/əʊ ˈkɛli/An Irish surname of Gaelic origin meaning 'descendant of Ceallach'nounLow
- o'neill/əʊˈniːl/A surname of Irish origin, historically associated with a prominent Gaelic family and kings.nounLow (as a common noun concept); High (as a specific proper noun/surname).
- o'toole/əʊˈtuːl/A surname of Irish origin.nounLow (as a common noun/proper noun; high frequency for specific famous individuals).
- o-ring/ˈəʊ rɪŋ/A flat, doughnut-shaped ring, often made of rubber, polymer, or metal, used primarily as a static or dynamic seal in mechanical assemblies to prevent the leakage of fluids or gases.nounLow
- o. henry/ˌəʊ ˈhen.ri/The pen name of the American short story writer William Sydney Porter (1862-1910), known for his witty, clever plots and surprise endings.nounC1
- o.g./ˌəʊ ˈdʒiː/A person who is highly experienced and respected, often seen as an authentic originator in a particular field or culture, especially hip-hop.abbreviationnounMedium
- o.k./ˌəʊˈkeɪ/A term indicating agreement, approval, or acceptability; satisfactory.adjectiveadverbinterjectionnounverbverb-transitiveA1 (Extremely High)
- oaf/əʊf/A stupid, clumsy, or awkward person.nounC1
- oahu/əʊˈɑːhuː/The third largest and most populous island in the Hawaiian archipelago.nounC1/C2
- oak/əʊk/A large, deciduous tree of the genus Quercus, known for its hard wood, lobed leaves, and acorns.adjectivenounB1
- oak apple/ˌəʊk ˈæp(ə)l/A round, spongy gall that grows on oak trees, caused by certain species of wasps laying eggs.nounLow
- oak creek/ˈəʊk ˈkriːk/A small stream or brook that flows through or near an area where oak trees are prominent.nounLow
- oak fern/ˈəʊk ˌfɜːn/A type of fern (genus Gymnocarpium) that often grows in oak woodlands or has leaves resembling oak leaves.nounLow
- oak forest/ˈəʊk ˈfɒr.ɪst/A large area of land densely populated with oak trees.nounB2
- oak gall/ˈəʊk ˌɡɔːl/A spherical, abnormal growth (a gall) formed on an oak tree, caused by the chemical secretions of certain insects, particularly gall wasps, as they lay their eggs.nounLow/C2
- oak harbor/ˌəʊk ˈhɑː.bə/A placename referring to a specific town, often a settlement or port area where oak trees are or were a prominent feature.nounVery Low (Proper Noun)
- oak lawn/ˌəʊk ˈlɔːn/A town or city name (in the USA), specifically a proper noun referring to a municipality.nounLow
- oak leaf cluster/ˈəʊk liːf ˈklʌstə/A small bronze or silver device, shaped like a cluster of oak leaves and acorns, worn on a military ribbon to denote the award of an additional decoration or for multiple awards of the same medal.nounC2
- oak leather/ˈəʊk ˌleðə/A type of hard-wearing, waterproofed leather traditionally tanned using oak bark or with tannins derived from oak.nounC1 (very low frequency; technical/specialist)
- oak park/əʊk pɑːk/A park or area of land planted with oak trees.nounLow in general English, but high in specific geographical contexts.
Showing 21–40 of 3187 words.