Yes, bewared is in the scrabble dictionary.

What is the meaning of Bewear?

verb (used with object) to be wary, cautious, or careful of (usually used imperatively): Beware such inconsistency. Beware his waspish wit.

What does Bewares mean?

1. to be wary of: Beware his waspish wit. 2. to be cautious or careful: Beware of the dog.