o’er stands for throughout a period of time

oarsmanship stands for skill as an oarsman

oak fern stands for bright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphere

Oakley stands for United States sharpshooter who was featured in Buffalo Bill’’s Wild West Show (1860-1926)

oarswoman stands for a woman oarsman

Oak Leaf Cluster stands for a United States military decoration consisting of bronze or silver oak leaves and acorns awarded to anyone who has won a given medal before

O’Brien stands for Irish writer (born in 1932)

o.d. stands for dose too heavily

O level stands for the basic level of a subject taken in school

oak-leaved goosefoot stands for annual European plant with spikes of greenish flowers and leaves that are white-hairy beneath

oak chestnut stands for a tree of the genus Castanopsis

O.E.D. stands for an unabridged dictionary constructed on historical principles

oarsman stands for someone who rows a boat

oast house stands for a building containing an oast (a kiln for drying hops)

O’Keeffe stands for United States painter (1887-1986)

O’Casey stands for Irish playwright (1880-1964)

Oahu Island stands for an island of central Hawaii (between Molokai and Kauai)

O’Neill stands for United States playwright (1888-1953)

oarfish stands for thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin

O stands for the 15th letter of the Roman alphabet, the blood group whose red cells carry neither the A nor B antigens, a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas ,constitutes 21 percent of the atmosphere by volume ,the most abundant element in the earth’’s crust

O’Toole stands for British actor (born in Ireland in 1932)

Oakland stands for a city in western California on San Francisco Bay opposite San Francisco

OAS stands for an association of countries in the western hemisphere

O ring stands for a gasket consisting of a flat ring of rubber or plastic

O’Flaherty stands for Irish writer of short stories (1896-1984)

oarlock stands for a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing

O’Hara stands for United States writer (1905-1970)

oat stands for seed of the annual grass Avena sativa (spoken of primarily in the plural as `oats”), annual grass of Europe and North Africa ,grains used as food and fodder (referred to primarily in the plural: `oats”)

oakleaf goosefoot stands for annual European plant with spikes of greenish flowers and leaves that are white-hairy beneath

oakum stands for loose hemp or jute fiber obtained by unravelling old ropes

Oahu stands for an island of central Hawaii (between Molokai and Kauai)

oast stands for a kiln for drying hops

oak stands for a deciduous tree of the genus Quercus ,has acorns and lobed leaves, the hard durable wood of any oak ,used especially for furniture and flooring

oaken stands for consisting of or made of wood of the oak tree

o’clock stands for according to the clock

oar stands for an implement used to propel or steer a boat

O’Connor stands for United States writer (1925-1964)

oak blight stands for a black plant louse that lives on oaks and dogwoods

O.K. stands for an endorsement, give sanction to, being satisfactory or in satisfactory condition, in a satisfactory or adequate manner ,(`alright” is a nonstandard variant of `all right”)

oak apple stands for oak gall caused by larvae of a cynipid wasp

oaf stands for an awkward stupid person

O. Henry stands for United States writer of short stories whose pen name was O. Henry (1862-1910)

oafish stands for ill-mannered and coarse and contemptible in behavior or appearance

oak tree stands for a deciduous tree of the genus Quercus

oasis stands for a shelter serving as a place of safety or sanctuary, a fertile tract in a desert (where the water table approaches the surface)