retainment, n. retention.

retaliate, v. avenge, requite, repay.

retaliation, n. revenge, requital, retribution.

retard, v. impede.

retarding, n. retardation.

retentive, a. tenacious.  Antonyms:  unretentive, irretentive.

reticence, n. reserve, uncommunicativeness, taciturnity.

reticent, a. taciturn, reserved, uncommunicative.

retinue, n. train, suite, followers.

retire, v. withdraw, retreat, recede, retrocede, leave, secede.

retired, a. secluded, sequestered, unfrequented, withdrawn.

retirement, n. withdrawal, seclusion, retreat.

retiring, a. diffident, shy, coy, shrinking, reserved, modest.

retract, v. recant, rescind, recall, disavow.

retraction, n. recantation, rescission, disavowal.

retreat, n. retirement, withdrawal; refuge, asylum, seclusion, privacy, fastness.

retreat, v. retire, withdraw, recede.

retrench, v. curtail, lessen, diminish, abridge; limit, confine.

retrenchment, n. diminution, curtailment, abridgment, lessening.

retribution, n. retaliation, repayment, requital.

retrograde, v. retrocede, recede, decline, deteriorate.

retrogression, n. retrogradation, decline, regression, deterioration.

return, v. restore, repay, refund, replace; recur, regress, reappear, revert; requite, retaliate, repay; repatriate.

return, n. restoration, restitution, repayment, requital, retribution, redress; recurrence, regress, reversion; repatriation, atavism; recrudescence; relapse.

returning, a. recurrent, recurring, intermittent.

reveal, v. disclose, unveil, expose, divulge, impart.

revel, n. carousal, festivity, saturnalia.

revel, v. carouse; luxuriate, wanton.

revelation, n. disclosure, divulgement, exposition, apocalypse.

reveler, n. carouser, bacchanal, roysterer, bacchant, bacchanalian.

revelry, n. reveling, carousal, wassail, saturnalia, riot, bacchanal.

revenge, v. avenge, retaliate, wreak vengeance.

revenge, n. vengeance, retaliation.

revengeful, a. vindictive, implacable, resentful, rancorous.

revenue, n. income.

reverberate, v. resound, reecho.

reverberation, n. resonance, reecho.

revere, v. venerate, reverence, honor, respect.

reverence, n. veneration.

reverence, v. revere, venerate.

reverent, a. reverential, humble.

reverse, v. invert; overthrow, subvert, overturn; revoke, annul, rescind, countermand.

reverse, n. opposite, contrary, counterpart; reversal; misfortune, failure.

reversion, n. succession; atavism; escheat.

review, v. reconsider, revise, reexamine, retrace.

review, n. reexamination, reconsideration, retrospect, revision.