Yes, over is a Scrabble word!

Adverb

1. At or to a point across intervening space etc.

2. Throughout an area

3. Throughout a period of time

4. Beyond the top or upper surface or edge; forward from an upright position;

5. Over the entire area

Adjective

1. Having come or been brought to a conclusion

Noun

1. (cricket) the division of play during which six balls are bowled at the batsman by one player from the other team from the same end of the pitch