7 letters · 14 points in Scrabble
noun the working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects
originFrom Ancient Greek συνεργία (sunergía, “cooperation”), from σύν (sún, “with, together”) + ἔργον (érgon, “work”). By surface analysis, syn- + -ergy.
Etymology from Wiktionary, CC BY-SA 3.0