The term 'Can of Worms' is a metaphor for a situation that has the potential to become complicated and difficult to resolve. The two crossword solutions for this term are 'BAIT' (4 letters) and 'opena' (5 letters). BAIT is something used to lure or entice someone into a situation, while opena is an archaic word meaning to open or to begin. Together, these two words suggest that a can of worms is something that is deliberately opened or started in order to create a difficult situation.