Two-way street is a common phrase that means reciprocal or mutually beneficial. It can be used to describe a relationship or situation where both parties benefit mutually. Synonyms for two-way street may include two-sided, give-and-take, mutual, shared, reciprocal, symbiotic, or interdependent. These words all convey the idea of an exchange where both parties benefit in some way. Alternatively, some other synonyms that people might use to convey this idea include collaboration, partnership, teamwork, or co-operation. Overall, these are all powerful phrases that can help to communicate the importance of engaging in positive, mutually beneficial relationships with others.