The Collaborative International Dictionary of English v.0.48:

Dizen \Diz"en\, v. t. [imp. & p. p. Dizened; p. pr. & vb. n.
   Dizening.] [Perh. orig., to dress in a foolish manner, and
   allied to dizzy: but cf. also OE. dysyn (Palsgrave) to put
   tow or flax on a distaff, i. e., to dress it. Cf. Distaff.]
   1. To dress; to attire. [Obs.] --Beau. & Fl.
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   2. To dress gaudily; to overdress; to bedizen; to deck out.
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            Like a tragedy queen, he has dizened her out.
                                                  --Goldsmith.
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            To-morrow when the masks shall fall
            That dizen Nature's carnival.         --Emerson.
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WordNet (r) 3.0 (2006):

dizen
    v 1: dress up garishly and tastelessly [syn: bedizen, dizen]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "dizen":
   adorn, array, beautify, bedeck, bedizen, blazon, color, dandify,
   deck, deck out, decorate, doll up, dress, dress up, embellish,
   emblazon, embroider, enrich, fancy up, fig out, fix up, furbish,
   garnish, get up, grace, gussy up, ornament, overdress, paint,
   prank, prank up, preen, prettify, pretty up, primp, primp up,
   prink, prink up, rag out, redecorate, redo, refurbish, set off,
   set out, slick up, smarten, smarten up, spruce up, titivate,
   trick out, trick up, trim