rust of plants. ferrugo.
rusty, a. seruginous; ferruginous; reasty, [rancid], [musty], fusty, mildewed; discolored, stained; rubiginous.
rut, n. [groove]; roaring (of waves), rote.
rut, n. œstrus, [heat], œstruation. Associated word: œstrual.
ruth, n. [pity], tenderness, [compassion], [mercy].
ruthful, a. [pitiful], [tender], compassionate, [merciful].
ruthless, a. [pitiless], [cruel], truculent, [relentless], [implacable], fell, [hard-hearted].
ruthlessness, n. truculence, implacability, cruelty, mercilessness.
ruttish, a. [lustful], [salacious], [lascivious].
rye, n. Associated words: ergot, ergotism, ergotized.