The search results provide several possible answers to the crossword clue "What might go from one side to the other?" Here are the options:

• Bridge: This is a possible answer with seven letters).
• Traitor: This is a possible answer with seven letters.
• Boomerang: This is a possible answer with nine letters).
• Transit: This is a possible answer with seven letters.

It is important to note that there may be other possible answers to this crossword clue, and the correct answer may depend on the specific crossword puzzle being solved.