requirement, n. [demand], requisition, [requisite]; [command], [essential], [need].
requisite, a. [necessary], required, [essential], indispensable.
requital, n. [recompense], [remuneration], [retribution], recaliation, reprisal.
requite, v. compensate, remunerate, [repay], [pay], [retaliate], avenge, reciprocate.
rescue, n. [deliverance], [liberation], [salvation], [ransom], extrication, disentanglement.
rescue, v. [release], deliver, [liberate], recapture, [redeem], [save], extricate, disenthrall.
resemblance, n. [likeness], similitude, [similarity], [analogy], parity, semblance.
resentment, n. [dudgeon], [umbrage], [displeasure], [grudge].
reserve, n. [reticence], [constraint], uncommunicativeness, taciturnity, [restraint].
reserved, a. retained, withheld, excepted; [uncommunicative], [reticent], taciturn, restrained.