| 1 | obey | v. | to act as one is ordered to act |
| 2 | object | v. | to show that one does not like or approve; to protest; n. something not alive that can be seen or touched |
| 3 | observe | v. | to watch; to look at carefully; to celebrate or honor something ("They will observe the anniversary of the day she was born.") |
| 4 | occupy | v. | to take and hold or to control by force |
| 5 | ocean | n. | the area of salt water that covers almost seventy-five percent of the earth's surface; any of the five main divisions of this water |
| 6 | of | prep. | made from; belonging to; about; connected to; included among |
| 7 | off | ad. | away; at a distance; condition when something is no longer operating or continuing; not on; not connected |
| 8 | offensive | n. | a military campaign of attack; ad. having to do with attacking |
| 9 | offer | v. | to present or propose; n. the act of presenting or proposing; that which is presented or proposed |
| 10 | office | n. | a room or building where business or work is done; a public position to which one is elected or appointed |
| 11 | officer | n. | a person in the military who commands others; any person who is a member of a police force |
| 12 | official | n. | a person with power in an organization; a representative of an organization or government; ad. of or about an office; approved by the government or someone in power |
| 13 | often | ad. | many times |
| 14 | oil | n. | a thick liquid that does not mix with water and that burns easily; a black liquid taken from the ground and used as fuel |
| 15 | old | ad. | not young or new; having lived or existed for many years |
| 16 | on | prep. | above and held up by; touching the upper surface of ("The book is on the table."); supported by ("He is on his feet."); about ("The report on the meeting is ready."); at the time of ("He left on Wednesday.") |
| 17 | once | ad. | one time only |
| 18 | only | ad. | being the single one or ones; no more than ("We have only two dollars.") |
| 19 | open | v. | to start ("They opened talks."); ad. not closed; not secret |
| 20 | operate | v. | to do work or a job; to cut into the body for medical reasons |
| 21 | opinion | n. | a belief based on one's own ideas and thinking |
| 22 | oppose | v. | to be against; to fight against |
| 23 | opposite | ad. | different as possible; completely different from; exactly the other way ("North is the opposite direction from south.") |
| 24 | oppress | v. | to make others suffer; to control by the use of unjust and cruel force or power |
| 25 | or | conj. | giving another of two choices; giving the last of several choices |
| 26 | orbit | v. | to travel in space around a planet or other object; n. the path or way an object travels in space around another object or planet |
| 27 | order | v. | to give a command; to tell someone what to do; n. a command; the correct or normal way things are organized; a peaceful situation in which people obey laws |
| 28 | organize | v. | to put in order; to put together into a system |
| 29 | other | ad. | different; of another kind; the remaining one or ones of two or more ">("That man is short; the other is tall.") |
| 30 | our | ad. | of or belonging to us |
| 31 | oust | v. | to force to leave; to remove by force |
| 32 | out | ad. | away from the inside; opposite of in |
| 33 | over | conj. | above; covering; across, in or on every part of ("all over the world") |
| 34 | overthrow | v. | to remove from power; to defeat or end by force |
| 35 | owe | v. | to pay or have to repay (usually money) in return for something received |
| 36 | own | v. | to have or possess for oneself |