Mutually beneficial and Synergetic

Mutually beneficial adjective - Mutually dependent.

Synergetic and mutually beneficial are semantically related. In some cases you can use "Synergetic" instead an adjective phrase "Mutually beneficial".

Synergetic adjective - Working together; used especially of groups, as subsidiaries of a corporation, cooperating for an enhanced effect.

Mutually beneficial and synergetic are semantically related. You can use "Mutually beneficial" instead an adjective "Synergetic".