English Words Starting With O

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

o canada
nounMedium (highly frequent in Canadian contexts, infrequent elsewhere)
/ˌəʊ kəˈnædə/The title and opening line of the national anthem of Canada.
o gauge
nounLow
/ˈəʊ ˌɡeɪdʒ/A standard size for model railways, with a track gauge of 1.25 inches (32mm) and a scale of 1:43 or 1:48.
o grade
nounLow (historical/regional term)
/ˈəʊ ˌɡreɪd/In historical Scottish education, a qualification (Ordinary Grade) taken around age 16, equivalent to a lower-level GCSE or Standard Grade, now replaced.
o horizon
nounC2
/ˈəʊ haɪˌrəʊ.zən/The topmost soil layer consisting mostly of organic matter, such as leaf litter and decomposing plant material.
o level
nounC2
/ˈəʊ ˌlev.əl/A subject-specific qualification in secondary education, particularly in the UK and some Commonwealth countries, typically taken at around age 16.
o star
nounB1
/stɑː/A bright point of light in the night sky that is a massive, distant celestial body producing its own light.
o'boyle
nounC1
/əʊˈbɔɪl/A surname of Irish origin, typically indicating descent from someone named Boyle with the prefix 'O'' meaning 'descendant of'.
o'brien
nounLow-Medium
/əʊ ˈbraɪ.ən/A surname of Irish origin, specifically meaning 'descendant of Brian'.
o'brien potatoes
plural-nounLow
/əʊˈbraɪ.ən pəˈteɪ.təʊz/A North American culinary dish consisting of pan-fried diced potatoes, onions, and diced green and red bell peppers.
o'casey
nounLow
/əʊˈkeɪsi/An Irish surname, most famously associated with the playwright Sean O'Casey.
o'connell
nounLow
/əʊˈkɒnəl/A proper noun, primarily an Irish surname of Gaelic origin.
o'connor
nounLow
/əʊˈkɒn.ə/A surname of Irish origin meaning 'descendant of Conchobhar', an ancient personal name meaning 'hound lover' or 'lover of hounds'.
o'day
nounVery High
/ˌəʊˈkeɪ/Expression of agreement, approval, or acceptance; indicating that something is satisfactory, adequate, or permissible.
o'fallon
nounLow
/əʊˈfælən/A proper noun, primarily a surname of Irish origin, and the name of several places in the United States.
o'faolain
nounLow (C2)
/əʊˈfeɪlən/An Irish surname of Gaelic origin, meaning 'descendant of Faolán'.
o'flaherty
nounLow (Proper noun, specific to certain contexts and communities)
/əʊˈflæhəti/An Irish surname, specifically of Gaelic origin, denoting familial lineage.
o'hara
nounLow
/əʊˈhɑːrə/A common Irish surname of Gaelic origin, often associated with Irish families and cultural heritage.
o'hare
nounMedium (Common in specific geographical/travel contexts, rare otherwise)
/əʊˈhɛə/A proper noun, most commonly referring to O'Hare International Airport in Chicago, USA.
o'higgins
nounVery Low
/əʊ ˈhɪɡɪnz/A proper noun referring to a surname of Irish origin, most famously associated with Bernardo O'Higgins, a leader in the Chilean independence movement.
o'keeffe
nounVery Low
/əʊˈkiːf/A surname of Irish origin, typically referring to a family name associated with the Irish clan Ó Caoimh.

Showing 1–20 of 3187 words.