risk, v. [hazard], [endanger], [peril], imperil, [jeopard], [jeopardize].
risky, a. [hazardous], [unsafe], [perilous], jeopardous, [dangerous], [precarious].
rite, n. [ceremony], ordinance.
ritual, n. liturgy, consuetudinary.
rival, n. [competitor], emulator, [antagonist].--a. competing, competitive, emulative.
rival, v. compete, emulate.
rivalry, n. [competition], emulation, [contention].
riven, a. [cleft], [split], rent asunder.
river, n. Associated words: potamology, potamography, riparian, riparious, fluvial, levee, wady, estuary, fluviatic, fluviatile, bayou, pothole, dredge, fluvicoline, fluviograph, fluviometer, crevasse, anadron, tributary, embouchure, barrage.
rivulet, n. [rill], [creek], streamlet, runnel, runlet, [brook], bourn.