The Collaborative International Dictionary of English v.0.48:

Moil \Moil\, v. t. [imp. & p. p. Moiled; p. pr. & vb. n.
   Moiling.] [OE. moillen to wet, OF. moillier, muillier, F.
   mouller, fr. (assumed) LL. molliare, fr. L. mollis soft. See
   Mollify.]
   To daub; to make dirty; to soil; to defile.
   [1913 Webster]

         Thou . . . doest thy mind in dirty pleasures moil.
                                                  --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Moil \Moil\, v. i. [From Moil to daub; prob. from the idea of
   struggling through the wet.]
   To soil one's self with severe labor; to work with painful
   effort; to labor; to toil; to drudge.
   [1913 Webster]

         Moil not too much under ground.          --Bacon.
   [1913 Webster]

         Now he must moil and drudge for one he loathes.
                                                  --Dryden.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Moil \Moil\, n.
   A spot; a defilement.
   [1913 Webster]

         The moil of death upon them.             --Mrs.
                                                  Browning.
   [1913 Webster]

WordNet (r) 3.0 (2006):

moil
    v 1: work hard; "She was digging away at her math homework";
         "Lexicographers drudge all day long" [syn: labor,
         labour, toil, fag, travail, grind, drudge,
         dig, moil]
    2: be agitated; "the sea was churning in the storm" [syn:
       churn, boil, moil, roil]
    3: moisten or soil; "Her tears moiled the letter"

Moby Thesaurus II by Grady Ward, 1.0:

119 Moby Thesaurus words for "moil":
   agitation, be turbulent, bluster, bobbery, boil, boiling, brouhaha,
   bubble, bustle, churn, clamor, commotion, conturbation, dig,
   dirty work, discomposure, disorder, disquiet, disquietude,
   disturbance, donkeywork, drive, drudge, drudgery, ebullition,
   embroilment, employment, excitement, fag, fatigue, ferment,
   fermentation, fever, feverishness, fidgets, flap, flurry, fluster,
   flutteration, foment, fume, fuss, grind, grub, hammer, hammer away,
   handiwork, handwork, hubbub, hurly-burly, industry, inquietude,
   jitters, jumpiness, labor, lather, lick, lick of work, maelstrom,
   malaise, manual labor, mill, mill around, nerviness, nervosity,
   nervousness, peg, peg away, perturbation, plod, plug, plug along,
   plug away, plugging, pound away, rat race, restlessness, roil,
   rout, row, ruction, scut work, seethe, seething, simmer, slavery,
   slog, slogging, smolder, spadework, stir, strain, strive, stroke,
   stroke of work, sweat, swirl, task, tiresome work, to-do, toil,
   travail, treadmill, trepidation, trepidity, tug, tumult,
   tumultuation, turbidity, turbulence, turmoil, twitter, unease,
   unrest, uproar, upset, wade through, work, work away