English words starting with O

Used after a number from one to twelve to indicate the hour when telling the time.

Contraction of 'over'.

A flat ring made of rubber or plastic, used as a seal in mechanical joints to prevent the escape of a fluid or gas.

a stupid, clumsy, or awkward person

stupid, rude, or awkward in behavior or appearance

the quality or state of being stupid, clumsy, or socially awkward.

a large tree that produces acorns and has lobed leaves, or the hard wood of this tree.

Having walls or surfaces covered with panels made of oak wood.

Shaded or sheltered by oak trees.

made of wood from an oak tree

Wood from an oak tree.

having the taste or smell of oak, especially from being aged in an oak barrel

A long pole with a wide, flat blade at one end, used for rowing a boat.

a U-shaped device or a pair of metal posts on the side of a boat that holds an oar in place and serves as a fulcrum for rowing.

a person who rows a boat, especially as a member of a racing crew

a fertile spot in a desert where water is found.

A type of cereal plant grown in cool climates for its edible seeds.

a formal promise, especially one made in a court of law

A coarse flour made by grinding oats, or a porridge made by boiling this in water or milk.

A type of cereal plant widely grown for its seed.

Of or relating to the Mexican state of Oaxaca, its people, or their culture.

A medical doctor who specializes in obstetrics and gynecology

The quality of refusing to change your mind or your actions in any way; stubbornness.

stubbornly refusing to change one's opinion or course of action.

A system of spiritual and healing practices, and a form of sorcery, originating among the enslaved West Africans in the West Indies.

The act or practice of following instructions or obeying authority.

Doing what you are told to do; willing to obey.

In a manner that shows a willingness to comply with orders or requests; in an obedient way.

A gesture expressing respect, such as a bow or curtsy.

A tall, four-sided stone pillar that tapers to a point at the top, originally erected in ancient Egypt.

Excessively fat or overweight.

The condition of being very fat in a way that is unhealthy.

connected with or caused by the condition of being excessively overweight.

to do what you are told or expected to do according to someone in authority or a rule or law

To make something obscure, unclear, or unintelligible.

The action of making something obscure, unclear, or unintelligible.

A notice of a person's death, especially in a newspaper; an obituary.

A notice of a person's death, often with a brief biography, published in a newspaper or read at a funeral service.

A material thing that can be seen and touched.

(of a computer language or system) designed using structures called objects, which contain both data and the procedures to operate on that data, and which can interact with each other.

The act of treating a person as an object or a thing, disregarding their personality or humanity.

Treated as an object or a thing, without regard to personal dignity or individuality.

to treat a person or idea as a physical object or as if they have no feelings or personality

a reason or feeling of disapproval or opposition to something

unpleasant or offensive and likely to make people object or disapprove.

(of a person or their judgment) not influenced by personal feelings or opinions in considering and representing facts.

In a way that is not influenced by personal feelings or opinions; based on facts.

The tendency to lay stress on what is external to or independent of the mind.

the quality of being based on facts and not influenced by personal beliefs or feelings

a person who expresses or acts upon opposition or disapproval, especially on moral grounds.

An administrative division or region in some Slavic countries, especially Russia and Ukraine.

Having a shape that is flattened at the poles.

the act of offering something, such as a sacrifice or gift, to a god or deity.

to make someone legally or morally bound to do something

required to do something because of a law, rule, or promise

something that you must do because of a law, rule, promise, etc.

required by a law, rule, or custom

to force or require someone to do something because of a law, rule, or promise

feeling or expressing gratitude or indebtedness for a service or favor.

willing to help or do things for other people

in a willing and helpful way

not straight or direct; slanting

In a slanting or sloping direction; not straight or level.

the quality or state of being oblique; deviation from a straight line, a right angle, or a moral or intellectual standard.

to destroy something completely so that nothing remains

the act of destroying something completely so that nothing remains

The state of being completely forgotten or unknown.

not aware of or not concerned about what is happening around one.

In a manner showing that one is not aware of or not concerned about what is happening around them.

the state or condition of being unaware or unconscious of what is happening around one.

Having a rectangular shape that is longer than it is wide.

strong public criticism or verbal abuse.

Extremely unpleasant or offensive, especially in a way that makes you feel annoyed or angry.

in an extremely unpleasant, offensive, or annoying manner.

a woodwind instrument with a double reed and a slender conical tube, having a penetrating, poignant sound.

A person who plays the oboe.

Offensive or disgusting by accepted standards of morality and decency, especially in relation to sexual matters.

In a way that is extremely offensive, especially in a sexual or moral sense.

extremely offensive, indecent, or shocking language or behavior, especially of a sexual nature.

The practice of deliberately preventing the facts or full details of something from becoming known.

a person who deliberately prevents the facts or full details of something from becoming known.

not discovered or known about; uncertain

made difficult to see or understand; hid or concealed from view.

in a way that is not clearly expressed or easily understood.

Making something difficult to see by covering it or making it dark or unclear.

The state of being unknown, inconspicuous, or forgotten

excessively eager to serve, obey, or please someone, often in a way that seems insincere or fawning.

In a manner that is excessively obedient or attentive in order to gain favor.

The quality or state of being too eager to help or obey someone important, in a way that seems insincere or servile.

able to be seen or noticed

The practice of obeying a law, celebrating a holiday, or following a custom or rule.

Quick to notice things; paying close attention to details.

the act of watching somebody/something carefully for a period of time, especially to learn something

Relating to or based on the action of watching something or someone carefully in order to gain information.

A building or place equipped with a telescope or other scientific equipment for observing and studying stars, planets, and weather.

to watch or notice something carefully

noticed or perceived something using your senses, especially sight.

a person who watches or notices something, especially in a formal or scientific context.

To preoccupy or fill the mind of someone continually and to a troubling extent.

Thinking about something or someone all the time, to an excessive degree.

An idea or thought that continually preoccupies or intrudes on a person's mind.

Relating to or characteristic of an obsession; thinking about something or someone too much or in a way that is not normal

Thinking about something or someone too much or in a way that is not normal or healthy

Relating to or characterized by persistent, unwanted thoughts (obsessions) and repetitive behaviors (compulsions).

in a way that involves thinking about something or someone constantly or excessively

The state or condition of having thoughts that are continually preoccupied with something to an excessive or unhealthy degree.

A type of dark, hard, glass-like volcanic rock, often black or dark green, that breaks with a very sharp edge.

the state of becoming old-fashioned and no longer useful

becoming obsolete; going out of use or date.

no longer produced or used; out of date.

something that blocks your way so that movement or progress is prevented or made more difficult

Relating to the branch of medicine and surgery concerned with childbirth and the care of women giving birth.

Relating to the branch of medicine and surgery concerned with childbirth and the care of women giving birth.

A doctor who is specially trained to care for women during pregnancy and childbirth.

the branch of medicine and surgery concerned with childbirth and caring for and treating women in or in connection with childbirth.

The quality of being unreasonably determined, especially to act in a particular way and not to change at all, despite what anyone else says.

refusing to change your opinions, way of behaving, etc., despite attempts to persuade you; stubborn.

In a manner that shows an unreasonable and determined refusal to change one's mind or course of action.

noisy and difficult to control

To block or get in the way of something or someone.