The Collaborative International Dictionary of English v.0.48:

Fuss \Fuss\ (f[u^]s), n. [Cf. Fusome.]
   1. A tumult; a bustle; unnecessary or annoying ado about
      trifles. --Byron.
      [1913 Webster]

            Zealously, assiduously, and with a minimum of fuss
            or noise                              --Carlyle.
      [1913 Webster]

   2. One who is unduly anxious about trifles; a fussbudget.
      [R.]
      [1913 Webster]

            I am a fuss and I don't deny it.      --W. D.
                                                  Howell.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fuss \Fuss\, v. i. [imp. & p. p. Fussed; p. pr. & vb. n.
   Fussing.]
   To be overbusy or unduly anxious about trifles; to make a
   bustle or ado. --Sir W. Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fuss
    n 1: an excited state of agitation; "he was in a dither"; "there
         was a terrible flap about the theft" [syn: dither,
         pother, fuss, tizzy, flap]
    2: an angry disturbance; "he didn't want to make a fuss"; "they
       had labor trouble"; "a spot of bother" [syn: fuss,
       trouble, bother, hassle]
    3: a quarrel about petty points [syn: bicker, bickering,
       spat, tiff, squabble, pettifoggery, fuss]
    4: a rapid active commotion [syn: bustle, hustle, flurry,
       ado, fuss, stir]
    v 1: worry unnecessarily or excessively; "don't fuss too much
         over the grandchildren--they are quite big now" [syn:
         fuss, niggle, fret]
    2: care for like a mother; "She fusses over her husband" [syn:
       mother, fuss, overprotect]

Moby Thesaurus II by Grady Ward, 1.0:

330 Moby Thesaurus words for "fuss":
   addle, addle the wits, ado, agitate, agitation, air a grievance,
   altercation, argument, ball up, becloud, bedazzle, beef, befuddle,
   bellyache, bewilder, bicker, bickering, bitch, bleat, blood feud,
   blow off, bluff, bluster, bluster and bluff, blustering,
   boastfulness, bobbery, boil, boiling, bother, botheration, bravado,
   bravery, brawl, broil, brouhaha, bug, bullying, burn to, burst,
   bustle, buzz about, cacophony, carp at, chafe, chaos, chiffon,
   churn, clamor, clinquant, cloud, coil, commotion, complain,
   confuse, contention, controversy, conturbation, crab, croak, daze,
   dazzle, discombobulate, discomfit, discompose, discomposure,
   disconcert, disdain, disorder, disorganize, disorient, dispute,
   disquiet, disquietude, disturb, disturbance, dither, donnybrook,
   donnybrook fair, dustup, ebullition, electrify, embarrass,
   embroilment, entangle, excitement, falling-out, fanaticism,
   fanfaronade, feery-fary, ferment, fermentation, festoons, feud,
   fever, feverishness, fidgetiness, fidgets, fight, finery, fit,
   flap, fliting, flummox, flurry, fluster, flusteration, flustration,
   flutter, flutteration, flutteriness, fog, folderol, foment,
   fomentation, foofaraw, fracas, free-for-all, frenzy, fret,
   fret and fume, fret at, frilliness, frilling, frills,
   frills and furbelows, frippery, froufrou, fuddle, fuddy-duddy,
   fume, furor, furore, fury, fuss at, fuss-budget, fusser, fussiness,
   fusspot, gaiety, gaudery, get excited, gilding, gilt, gingerbread,
   granny, gripe, groan, grouch, grouse, growl, grumble, grunt,
   hardly wait, hassle, haste, hasten, hectoring, helter-skelter,
   henpeck, holler, howl, hubbub, hullabaloo, hurly-burly, hurrah,
   hurry, hurry about, imbroglio, inquietude, intimidation, itch to,
   jar, jitters, jolt, jump the gun, jumpiness, kick, lather,
   lodge a complaint, logomachy, maelstrom, make a fuss, malaise,
   maze, melee, miff, mist, mix up, moider, moil, muddle, murmur,
   mutter, nag, nerviness, nervosity, nervousness, nibble at,
   old maid, old woman, open quarrel, pandemonium, passion, paste,
   peck at, pell-mell, perplex, perturb, perturbation, pester,
   pick and choose, pick at, pick on, pinchbeck, polemic, pother,
   pucker, put out, quarrel, racket, rage, raise a howl, raise hell,
   rampage, rant, rattle, register a complaint, repine, restlessness,
   riot, rock, rodomontade, roil, rough-and-tumble, roughhouse, rout,
   row, ruckus, ruction, ruffle, rumpus, rush about, rush around,
   scorn, scramble, seethe, seething, shake, shake up, sharp words,
   shindig, shindy, shock, side, slanging match, snarl, spasm, spat,
   speed, splutter, spurn, spurt, sputter, squabble, squawk, squirm,
   stagger, stew, stink, stir, storminess, strife, superfluity,
   swagger, swashbucklery, sweat, sweat and stew, sweat it out, swirl,
   swivet, take on, tear around, tempestuousness,
   throw into confusion, tiff, tinsel, tizzy, to-do, trappings,
   trepidation, trepidity, trickery, trouble, trumpery, tumult,
   tumultuation, tumultuousness, turbidity, turbulence, turmoil,
   tussle, twitter, twitteration, unease, unquiet, unrest, unsettle,
   uproar, upset, vendetta, vortex, wail, wait impatiently, whine,
   whirl, whirlpool, whirlwind, whiz about, wildness, words, worry,
   wrangle, yammer, yap, yap at, yawp, yelp, zeal, zealousness