The Collaborative International Dictionary of English v.0.48:

Rejoice \Re*joice"\, n.
   The act of rejoicing. --Sir T. Browne.
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The Collaborative International Dictionary of English v.0.48:

Rejoice \Re*joice"\ (r[-e]*jois"), v. i. [imp. & p. p.
   Rejoiced (-joist"); p. pr. & vb. n. Rejoicing
   (-joi"s?ng).] [OE. rejoissen, OF. resjouir, resjoir, F.
   r['e]jouir; pref. re- re- + OF. esjouir, esjoir, F.
   ['e]jouir, to rejoice; pref. es- (L. ex-) + OF. jouir, joir,
   F. jouir, from L. gaudere to rejoice. See Joy.]
   To feel joy; to experience gladness in a high degree; to have
   pleasurable satisfaction; to be delighted. "O, rejoice beyond
   a common joy." --Shak.
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         I will be glad and rejoice in thy mercy. --Ps. xxxi. 7.
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   Syn: Syn. To delight; joy; exult; triumph.
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The Collaborative International Dictionary of English v.0.48:

Rejoice \Re*joice"\, v. t.
   1. To enjoy. [Obs.] --Bp. Peacock.
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   2. To give joy to; to make joyful; to gladden.
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            I me rejoysed of my liberty.          --Chaucer.
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            While she, great saint, rejoices heaven. --Prior.
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            Were he [Cain] alive, it would rejoice his soul to
            see what mischief it had made.        --Arbuthnot.
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   Syn: To please; cheer; exhilarate; delight.
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WordNet (r) 3.0 (2006):

rejoice
    v 1: feel happiness or joy [syn: rejoice, joy]
    2: to express great joy; "Who cannot exult in Spring?" [syn:
       exuberate, exult, rejoice, triumph, jubilate]
    3: be ecstatic with joy [syn: wallow, rejoice, triumph]

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "rejoice":
   adore, animate, appreciate, bask in, be pleased with, boost,
   brighten, buoy up, caper, caracole, carol, celebrate, cheer, chirp,
   chirrup, clap hands, dance, delight, delight in,
   derive pleasure from, devour, eat up, encourage, enjoy, enliven,
   exhilarate, exult, feast on, freak out on, frisk, frolic, gambol,
   get high on, give a lift, gladden, gloat over, glory, groove on,
   hearten, indulge in, inspire, inspirit, invigorate, joy, jubilate,
   like, lilt, liven, love, luxuriate in, pick up, rejoice,
   rejoice in, rejoice the heart, relish, revel, revel in, riot in,
   rollick, romp, savor, sing, skip, skip for joy, smack the lips,
   swim in, take pleasure in, vitalize, wallow in