nothing - n. not anything; no thing

now - ad. at this time; immediately

nowhere - ad. not in, to or at any place

nuclear - ad. of or about the energy produced by splitting atoms or bringing them together; of or about weapons that explode by using energy from atoms

number - n. a word or sign used to show the order or amount of things

O

obey - v. to act as one is ordered to act

object - v. to show that one does not like or approve; to protest; n. something not alive that can be seen or touched

observe - v. to watch; to look at carefully; to celebrate or honor something ("They will observe the anniversary of the day she was born.")

occupy - v. to take and hold or to control by force

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

of - prep. made from; belonging to; about; connected to; included among

off - ad. away; at a distance; condition when something is no longer operating or continuing; not on; not connected

offensive - n. a military campaign of attack; ad. having to do with attacking

offer - v. to present or propose; n. the act of presenting or proposing; that which is presented or proposed

office - n. a room or building where business or work is done; a public position to which one is elected or appointed

officer - n. a person in the military who commands others; any person who is a member of a police force

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