'Synergy' definitions:

Definition of 'synergy'

noun

The working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects [syn: synergy, synergism]

Definition of 'Synergy'

From: GCIDE

Synergy \Syn"er*gy\, n. [Gr. ?. See Synergetic.]
2. Combined action; especially (Med.), the combined healthy action of every organ of a particular system; as, the digestive synergy. [1913 Webster]
2. An effect of the interaction of the actions of two agents such that the result of the combined action is greater than expected as a simple additive combination of the two agents acting separately; -- also called synergism.. Opposite to antagonism. [PJC]

Synonyms of 'synergy'

From: Moby Thesaurus

accompaniment,
accordance,
agreement,
alliance,
association,
bipartisanship,
cahoots,
co-working,
coaction,
coadjuvancy,
coadministration,
coagency,
cochairmanship,
codirectorship,
coincidence,
collaboration,
collaborativeness,
collectivism,
collectivity,
collusion,
combination,
combined effort,
commensalism,
common effort,
common enterprise,
communalism,
communism,
communitarianism,
community,
complicity,
concert,
concerted action,
concomitance,
concord,
concordance,
concourse,
concurrence,
confluence,
conjunction,
consilience,
conspiracy,
cooperation,
cooperativeness,
correspondence,
duet,
duumvirate,
ecumenicalism,
ecumenicism,
ecumenism,
esprit,
esprit de corps,
fellow feeling,
fellowship,
harmony,
joining of forces,
joint effort,
joint operation,
junction,
mass action,
morale,
mutual assistance,
mutualism,
mutuality,
octet,
parasitism,
pooling,
pooling of resources,
pulling together,
quartet,
quintet,
reciprocity,
saprophytism,
septet,
sextet,
simultaneity,
solidarity,
symbiosis,
synchronism,
synergism,
team spirit,
teamwork,
trio,
triumvirate,
troika,
union,
united action