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List of 2-letter words beginning with

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There are 17 two-letter words beginning with O

OB• ob n. (Historical) a halfpenny.
• ob n. (Archaic) an objection.
• ob n. (Genetics) the obese gene.
OD• od n. (Now archaic, regional) (Euphemistic form of) God.
• od n. (Archaic) An alleged force or natural power, supposed, by Carl Reichenbach and others, to produce the…
• Od prop.n. An Indo-Aryan language spoken in Sindh and Punjab in Pakistan and Gujarat, Haryana, New Delhi and Rajasthan in India.
OE• oe n. (Literary or poetic, rare) A small island.
• oe n. A grandchild.
• Oe sym. Oersted.
OF• of prep. Expressing distance or motion.
• of prep. Expressing separation.
• of prep. Expressing origin.
OH• oh interj. Expression of surprise.
• oh interj. Expression of wonder, amazement, or awe.
• oh interj. Expression of understanding, affirmation, recognition, or realization.
OI• oi interj. Said to get someone’s attention; hey.
• oi interj. An expression of surprise.
• oi interj. An informal greeting, similar to hi.
OK• ok adj. (Informal) Alternative letter-case form of OK.
• Ok prop.n. A language family spoken in Papua New Guinea.
• Ok prop.n. Alternative form of Ok. Abbreviation of Oklahoma.
OM• om n. (Hinduism, Buddhism) A sacred, mystical syllable used in prayer and meditation.
• om v. (Intransitive) To chant the sacred syllable om.
• om interj. (Colloquial) Clipping of nom.
ON• on adj. In the state of being active, functioning or operating.
• on adj. Performing according to schedule; taking place.
• on adj. Fitted; covering; being worn.
OO• oo n. Any of four Hawaiian birds of the genus Moho, formerly classed with the honeyeaters and now believed to be extinct.
• oo interj. Alternative form of ooh.
• OO n. Alternative letter-case form of oo.
OP• op n. (Informal) Clipping of operation.
• op n. (Informal) Clipping of operator.
• op n. (Internet slang, chiefly in the plural) Clipping of opinion.
OR• or conj. Connects at least two alternative words, phrases, clauses, sentences, etc., each of which could make a passage true.
• or conj. (Logic) An operator denoting the disjunction of two propositions or truth values. There are two forms…
• or conj. Counts the elements before and after as two possibilities.
OS• os n. (Anatomy) Synonym of bone.
• os n. (Anatomy) An opening or entrance to a passage, particularly one at either end of the cervix, internal…
• os n. An osar or esker.
OU• ou n. A probably extinct species of Hawaiian honeycreeper, Psittirostra psittacea.
• ou n. (South Africa, colloquial) A fellow, guy, bloke.
• OU prop.n. Initialism of Open University.
OW• ow interj. Synonym of ouch (“cry of pain”).
• ow interj. (Music) Used for emotional emphasis.
• 'ow adv. (Dialectal) Pronunciation spelling of how.
OX• ox n. An adult castrated male of cattle (B. taurus), especially when used as a beast of burden.
• ox n. Any bovine animal (genus Bos). A neat, a beef.
• ox n. Abbreviation of oxygen.
OY• oy interj. An exclamation typically expressing mild frustration or expressing feelings of uncertainty or concern.
• oy interj. Alternative spelling of oi (“hey, hi, yo”).
• ѹ let. Deprecated text encoding of оу.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org.

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