el rabino, la rabina - rabbi
  el rédito - interest (as on an account), yield...
  redomado - out-and-out, outright, to the...
  la rama - branch (most meanings, including the...
  el rizo - curl, ripple, loop
  rocambolesco - far-fetched, incredible, hard to...
  el reloj - clock, watch, timepiece
  rojizo - reddish
  el refresco - soft drink, liquid refreshment, soda...
  el refugio - refuge, shelter
  el regazo - lap
  la rutina - routine
  rudo - rough (said of things or people),...
  rotundo - emphatic, definitive, categorical,...
  la rosquilla - ring-shaped pastry, doughnut
  roñoso - filthy, dirty, mean, rusty, miserly,...
  la ronda - song of endearment, group of...
  el romero, la romera - pilgrim
  el rascacielos - skyscraper
  el rasguño - scratch