Lucubration. Nocturnal study, meditation, speculation, cogitation.
Ant. Idleness, dulness, stupidity, torpor, vacuity.
Ludicrous. Laughable, comic, burlesque, droll, sportive, ridiculous, comical, odd, funny, farcical, absurd.
Ant. Grave, serious, important, momentous; sad, sorrowful, melancholy, tragic, mournful, lugubrious.
Lugubrious. Mournful, woful, pitiable, doleful, sad, sorrowful, melancholy, complaining.
Ant. Ludicrous, droll, ridiculous, comic, witty, jovial, absurd, funny, laughable, comical.
Lull, v. Compose, calm, quiet, soothe, hush, tranquilize, still.
Ant. Excite, aggravate, incite, stimulate, exasperate, provoke, inflame.
Luminous. Shining, brilliant, bright; illuminated; enlightened, intelligent, clear, intelligible.
Ant. Dark, black, gloomy; unintelligible, unintelligent, involved, mixed, confused.