A disturbance of the atmosphere marked by wind and usually by rain, snow, hail, sleet, or thunder and lightning.

A long running race of about 42 kilometers or 26 miles.

A new or difficult task that tests somebody’s ability and skill.

A unit for measuring distance equal to 1609 metres or 1760 yards.

A series of lessons or lectures on a particular subject.

A person who rides a bicycle.

A situations in which person or organizations compete with each other.

An unusual, exciting or dangerous experience, journey or series of event.

The amount of space between two places or things.

A group of people who form a business, club, etc. together in order to achieve a particular aim.