Cases of word usage

1) of the part that is opposite or behind the front (back)

2) the part of a view, picture etc that is at the back or behind the main objects, people etc (background)

3) to travel faster than (another) and leave her, him or it behind (outdistance)

4) to use force or effort on (a person or thing) so as to move (her, him, it) towards oneself or behind oneself and in the same direction (pull)

5) (of a person) slow or behind in (emotional, intellectual, physical ) development (retarded)

6) to grow, spread, in an irregular or untidy manner; to be (far) behind a group while moving forward (straggle)

7) a building etc for the performance of plays, for dramatic events etc; a room with seats in rows rising one behind another for lectures, scientific demonstrations etc (theatre)

8) a mark or series of marks left by a person or thing that has passed; a track or smell left by an animal or person; a path through rough country; (to cause something) to be pulled behind (through the air or over a surface) (trail)

9) allowing light to pass through so that objects (or at least their outlines) behind can be seen; (of a person, behaviour) obviously insincere etc (transparent)

10) an attempt; effort; (rugby); to test, use or do (something) as an experiment; a score made by putting the ball down behind the opponent's goal (try)