178. Concurrence -- N. concurrence, cooperation, coagency ; union; agreement &c 23; consilience ; consent, coincidence &c (assent) 488; alliance; concert, additivity, synergy &c 709; partnership &c 712.
179. Counteraction -- N. counteraction, opposition; contrariety &c 14; antagonism, polarity; clashing &c v.; collision, interference, inhibition, resistance, renitency, friction; reaction; retroaction &c (recoil) 277; counterblast ; neutralization &c (compensation) 30; vis inertiae [Lat.] ; check &c (hindrance) 706.