The Collaborative International Dictionary of English v.0.48:

euphoria \euphoria\ adj.
   a strong pleasant feeling of well-being or happiness; it is
   often caused by attainment of a desired goal or other
   incident of accomplishment, but may irrationally accompany a
   pathological manic state.

   Syn: elation, high.
        [PJC]

WordNet (r) 3.0 (2006):

euphoria
    n 1: a feeling of great (usually exaggerated) elation [syn:
         euphoria, euphory] [ant: dysphoria]

Moby Thesaurus II by Grady Ward, 1.0:

91 Moby Thesaurus words for "euphoria":
   abstraction, abulia, acceptance, alienation, amusement,
   animal pleasure, anxiety, anxiety equivalent, anxiety state,
   apathy, bodily pleasure, carnal delight, catatonic stupor, comfort,
   composure, compulsion, content, contentedness, contentment,
   coziness, creature comforts, dejection, depression, detachment,
   ease, ecstasy, elation, emotionalism, endpleasure, enjoyment,
   entertainment, entire satisfaction, exaltation, exhilaration,
   folie du doute, forepleasure, frenzy, fruition, fulfillment, fun,
   glee, gratification, great satisfaction, gusto, happiness,
   hearty enjoyment, hypochondria, hysteria, hysterics, indifference,
   insensibility, intellectual pleasure, intoxication, joie de vivre,
   keen pleasure, kicks, lethargy, luxury, madness, mania,
   melancholia, mental distress, obsession,
   pathological indecisiveness, peace of mind, physical pleasure,
   pleasure, preoccupation, psychalgia, psychomotor disturbance,
   quiet pleasure, reconcilement, reconciliation, relish, resignation,
   satisfaction, self-gratification, self-indulgence,
   sensual pleasure, sensuous pleasure, sexual pleasure, stupor,
   sweetness of life, tic, titillation, twitching, unresponsiveness,
   voluptuousness, well-being, withdrawal, zest



The Free On-line Dictionary of Computing (30 December 2018):

Euphoria

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