el lagarto - lizard
  la labia - ability to speak persuasively and/or...
  el linde, la linde - boundary, border, dividing line
  la lisonja - flattering remark, flattery
  el litro - liter
  la lujuria - lust
  la lema - slogan, motto, subject of a speech or...
  el llamador - doorbell, door-knocker, telephone ringer
  la lentilla - contact lens
  el lucero - bright star, morning star, evening star
  el liquen - lichen (either a skin diseases or a...
  la lenidad - leniency
  el letargo - lethargy, hibernation
  la levadura - yeast, leavening
  el lucimiento - brilliance (usually in a figurative...
  la lasitud - fatigue, weariness, tiredness,...
  la ludopatía - compulsive gambling, gambling addiction
  el lodazal - quagmire (literal or figurative), bog
  la logopedia - speech therapy, the science or study...
  la lenteja - lentil