State in which two ideas or opinions are the same.

System of tracks on which trains travel.

Argument with someone about something. To question the truth or reality of something.

That surprises you; not expected. Something unexpected that slightly shocks you. To do something that another person didn't expect.

Typical or normal; usual; ordinary. number expressing the central or typical value in a set of data. amount to or achieve as average rate or amount over period of time.

Every year; once a year.

each of four equal or corresponding parts into which something is or can be divided. One of the four time periods in a school calendar. To give a soldier a place to live for a short time.

having been thought about carefully. To think carefully about something.

Concerning or involving the center of an atom.

belonging to same family or type. To tell a story, or tell about a particular event.

explosive head of missile, torpedo, or similar weapon. Part of the missile that contains the explosive.

each of two or more related or complementary things. have mutual relationship or connection, in which one thing affects or depends on another.

A drink other than water.

person who is very knowledgeable about or skilful in particular area. Skillful people with special knowledge.

Open land that is away from towns and cities.