Roget's Thesaurus by Peter Mark Roget

#178. Concurrence.—N. concurrence, cooperation, coagency[obs3]; # union; agreement &c. 23; consilience[obs3]; consent, coincidence &c. (assent) 488; alliance; concert, additivity, synergy &c. 709; partnership &c. 712. common cause. V. concur, conduce, conspire, contribute; agree, unite; hang together, pull together, join forces, make common cause. &c. (cooperate) 709; help to &c. (aid) 707. keep pace with, run parallel; go with, go along with, go hand in hand with, coincide. Adj. concurring &c. v.; concurrent, in alliance with, banded together, of one mind, at one with, coinciding. Adv. with one consent. #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[obs3]; neutralization &c. (compensation) 30; vis inertiae[Lat]; check &c. (hindrance) 706. voluntary opposition &c. 708, voluntary resistance &c. 719; repression &c. (restraint) 751. opposites, action and reaction, yang and yin, yang-yin (contrariety)