A Synergy

1. (systems theory) A synonym of binding energy.
2. (physiology) The cooperation of two or more nerves, muscles, organs, etc.
3. (pharmacology) The combined action of two or more drugs where the effects are stronger than their mere sum.
4. (figuratively) Benefits resulting from combining different groups, people, objects or processes.

binding energy (in systems theory)

asynergy (absence of synergy)

antisynergy