<p><strong>Noun</strong></p><ul><li>Synergy: The joint action of agents, as drugs, that when taken together increase each other's effectiveness (antagonism).</li><li>Biochemistry, Pharmacology: The cooperative action of two or more stimuli or drugs.</li><li>Theology: The doctrine that the human will cooperates with the Holy Ghost in the work of regeneration. Compare monergism.</li></ul>