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retired, a. [secluded], [sequestered], unfrequented, withdrawn.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