SYNERGISM

n. synergy; Christian doctrine which states that salvation is obtained through cooperation between human will and divine mercy

Synergism, in general, may be defined as two or more agents working together to produce a result not obtainable by any of the agents independently. The word synergy or synergism comes from two Greek words: erg meaning "to work", and syn meaning "together"; hence, synergism is a "working together." Regarding the doctrine of salvation, this is essentially the view that God and man work together, each contributing their part to accomplish salvation in and for the individual. This is the view of salvation found in Arminianism and its theological predecessor Semi-Pelagianism. John Hendryx has stated it this way: Synergism is "...the doctrine that there are two efficient agents in regeneration, namely the human will and the divine Spirit, which, in the strict sense of the term, cooperate. This theory accordingly holds that the soul has not lost in the fall all inclination toward holiness, nor all power to seek for it under the influence of ordinary motives."
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Noun
1. the working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects
(synonym) synergy
(hypernym) natural process, natural action, action, activity
(hyponym) potentiation
2. the theological doctrine that salvation results from the interaction of human will and divine grace
(hypernym) theological doctrine, religious doctrine

(n.)
The doctrine or theory, attributed to Melanchthon, that in the regeneration of a human soul there is a cooperation, or joint agency, on the part both of God and of man.
  

An interaction of two or more chemicals that results in an effect greater than the sum of their separate effects.