noun - a part of a fish body that is used to swim and move around in the water

noun - a piece of electrical equipment where you store food in order to keep it cold and fresh

noun - a sound that is reflected off flat surfaces, e.g. off the wall of a rock, cliff, etc.

noun - a loud noise and a release of energy caused by a bomb going off, a volcano etc.

adjective - a number that you can easily divide by two, e.g. 2, 4, 6 etc, opposite of 'odd'

noun - a machine that makes something move, the inner part of a car etc. that makes it move

noun - a small brown insect with a long body and two pincers at the end of the body

noun, dated - a unit that was used to measure length, it is about the length of a man's arm

noun - a covering that you can wear on your head, it is made of real or false hair

noun - a small thing in which you carry your money, it is usually made of leather or plastic

noun - a kind of higher school where you study for a degree, e.g. to be a doctor etc.

noun - the body that moves around the earth at 28 day intervals, any natural satellite of a planet

noun - a fairy tale creature that looks like a woman but has a fish's tail instead of legs

noun - a building or a statue which is built as a memory of a famous person or event

noun - the distance (or a line) from the centre of a circle (or a sphere) to its edge