The Collaborative International Dictionary of English v.0.48:

Knot \Knot\, v. t. [imp. & p. p. Knotted; p. pr. & vb. n.
   Knotting.]
   1. To tie in or with, or form into, a knot or knots; to form
      a knot on, as a rope; to entangle. "Knotted curls."
      --Drayton.
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            As tight as I could knot the noose.   --Tennyson.
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   2. To unite closely; to knit together. --Bacon.
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   3. To entangle or perplex; to puzzle. [Obs. or R.]
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The Collaborative International Dictionary of English v.0.48:

Knotted \Knot"ted\, a.
   1. Full of knots; having knots; knurled; as, a knotted cord;
      the knotted oak. --Dryden.
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   2. Interwoven; matted; entangled.
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            Make . . . thy knotted and combined locks to part.
                                                  --Shak.
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   3. Having intersecting lines or figures.
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            The west corner of thy curious knotted garden.
                                                  --Shak.
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   4. (Geol.) Characterized by small, detached points, chiefly
      composed of mica, less decomposable than the mass of the
      rock, and forming knots in relief on the weathered
      surface; as, knotted rocks. --Percival.
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   5. Entangled; puzzling; knotty. [R.]
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            They're catched in knotted lawlike nets. --Hudibras.
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WordNet (r) 3.0 (2006):

knotted
    adj 1: tied with a knot; "his carefully knotted necktie"
    2: used of old persons or old trees; covered with knobs or
       knots; "gnarled and knotted hands"; "a knobbed stick" [syn:
       gnarled, gnarly, knotted, knotty, knobbed]

Moby Thesaurus II by Grady Ward, 1.0:

221 Moby Thesaurus words for "knotted":
   Byzantine, Herculean, abstruse, accumulated, affiliate, affiliated,
   agglomerate, aggregate, alike, allied, amassed, arduous, assembled,
   associate, associated, at par, au pair, balled up, banded together,
   bound, bracketed, brutal, bunched, bundled, burled, clumped,
   clustered, cockled, cockly, collateral, collected, combined,
   commensurate, complex, complicated, confounded, confused,
   conglomerate, congregate, congregated, conjoined, conjugate,
   connected, convoluted, copulate, correlated, corrugate, corrugated,
   coupled, crabbed, creased, crimped, crimpy, crinkled, crinkly,
   critical, crumpled, cumulate, daedal, delicate, demanding, devious,
   difficile, difficult, drawn, elaborate, embrangled, entangled,
   equal, equalized, even, even stephen, exacting, fascicled,
   fasciculated, fifty-fifty, formidable, fouled up, furrowed,
   gathered, glomerate, gnarled, gnarly, hairy, half-and-half,
   hand-in-glove, hand-in-hand, hard, hard-earned, hard-fought,
   heaped, implicated, in session, incorporated, integrated,
   interlinked, interlocked, interrelated, intimate, intricate,
   involuted, involved, jawbreaking, joined, joint, knitted, knobbed,
   knobbly, knobby, knoblike, knotty, knurled, knurly, laborious,
   labyrinthian, labyrinthine, leagued, level, like, linked,
   loused up, lumped, lumpy, many-faceted, massed, matched, mated,
   matted, mazy, mean, meandering, meeting, merged, messed up,
   mixed up, mucked up, multifarious, nip and tuck, no picnic, nodal,
   noded, nodiform, nodose, nodular, nodulated, noduled, not easy,
   nubbled, nubbly, nubby, of that ilk, of that kind, on a footing,
   on a level, on a par, on even ground, operose, packaged, paired,
   par, parallel, perplexed, piled, proportionate, puckered, puckery,
   pursed, pursy, quits, ramified, related, ridged, rigorous, rimpled,
   rippled, rough, roundabout, rucked, rugged, rugose, rugous,
   rumpled, screwed up, set with thorns, severe, snarled, spiny,
   spliced, square, stacked, stalemated, steep, strenuous, studded,
   subtle, tangled, tangly, thorny, ticklish, tied, toilsome, torose,
   tough, tricky, tubercular, tuberculous, tuberose, tuberous,
   twinned, twisted, undivided, united, unseparated, uphill, wed,
   wedded, wicked, wrapped up, wrinkled, wrinkly, yoked