The working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects.

synonym: synergism.

Roget 178: concurrence, cooperation, coagency^†; union; agreement etc. 23; consilience^†; consent, coincidence etc. (assent) 488; alliance; concert, additivity, synergy etc. 709; partnership etc. 712.    common cause.    ... show more

Roget 709: cooperation; coadjuvancy^†, coadjutancy^†; coagency^†, coefficiency^†; concert, concurrence, complicity, participation; union etc. 43; additivity, combination etc. 48; collusion.    association, alliance, colleagueship^†, joint stock, copartnership^†; cartel; confederation etc. (party) 712; coalition, fusion; a long pull a strong pull and a pull all together; logrolling, freemasonry.    unanimity etc. (assent) 488; esprit de corps, party spirit; clanship^†, partisanship; concord etc. 714.    synergy, coaction^†.    ... show more

Roget 175: influence; importance etc. 642; weight, pressure, preponderance, prevalence, sway; predominance, predominancy^†; ascendency^†; dominance, reign; control, domination, pull [Slang]; authority etc. 737; capability etc. (power) 157; effect etc. 154; interest.    synergy (cooperation) 709.    footing; purchase etc. (support) 215; play, leverage, vantage ground.    tower of strength, host in himself; protection, patronage, auspices.    ... show more

Dutch: synergie, synergisme
Polish: synergia, synergizm