The Collaborative International Dictionary of English v.0.48:

Maa \Maa\, n. [See New a gull.] (Zool.)
   The common European gull (Larus canus); -- called also
   mar. See New, a gull.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mar \Mar\, n.
   A mark or blemish made by bruising, scratching, or the like;
   a disfigurement.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mar \Mar\, n.
   A small lake. See Mere. [Prov. Eng.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mar \Mar\, v. t. [imp. & p. p. Marred (m[aum]rd); p. pr. & vb.
   n. Marring.] [OE. marren, merren, AS. merran, myrran (in
   comp.), to obstruct, impede, dissipate; akin to OS. merrian,
   OHG. marrjan, merran; cf. D. marren, meeren, to moor a ship,
   Icel. merja to bruise, crush, and Goth. marzjan to offend.
   Cf. Moor, v.]
   1. To make defective; to do injury to, esp. by cutting off or
      defacing a part; to impair; to disfigure; to deface.
      [1913 Webster]

            I pray you mar no more trees with wiring love songs
            in their barks.                       --Shak.
      [1913 Webster]

            But mirth is marred, and the good cheer is lost.
                                                  --Dryden.
      [1913 Webster]

            Ire, envy, and despair
            Which marred all his borrowed visage. --Milton.
      [1913 Webster]

   2. To spoil; to ruin. "It makes us, or it mars us." "Striving
      to mend, to mar the subject." --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mew \Mew\, n. [AS. m?w, akin to D. meeuw, G. m["o]we, OHG. m?h,
   Icel. m[=a]r.] (Zool.)
   A gull, esp. the common British species (Larus canus);
   called also sea mew, maa, mar, mow, and cobb.
   [1913 Webster]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006):

MAR
       Microprogram Address Register (IC)


Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "mar":
   be all thumbs, blemish, blight, blot, blunder, blunder away,
   blunder into, blunder on, blunder upon, boggle, botch, bruise,
   bumble, bungle, butcher, check, cicatrize, commit a gaffe, crack,
   craze, damage, deface, deform, destroy, disfigure, disproportion,
   distort, dysphemize, faux pas, flaw, flounder, fumble, harm, hurt,
   impair, kink, look a fright, look a mess, look bad, look like hell,
   look something terrible, lumber, miscue, misshape, muddle, muff,
   murder, mutilate, offend, offend the eye, play havoc with,
   prejudice, ruin, scab, scar, scarify, scratch, slip, split, spoil,
   stain, stumble, taint, tarnish, trip, truncate, twist, uglify,
   vitiate, warp, wreck