rugido, m., roar, roaring.
rugir, to roar.
ruido, m., sound, noise.
ruidoso, -a, noisy, loud.
ruin, m., wicked (mean or infamous) person; en hablando del — de Roma, cátale aquí que asoma, speak of the devil and he will appear.
ruina, f., ruin; pl., ruins.
ruinoso, -a, dilapidated, in ruins, ruinous.
ruiseñor, m., nightingale.
rumor, m., noise, murmur, sound, rumor, rustle.
rústico, m., rustic (fellow), peasant.