Open English Wordnet
Adjectives
(s)antic, fantastic, fantastical, grotesqueludicrously odd“Hamlet's assumed antic disposition”, “fantastic Halloween costumes”, “a grotesque reflection in the mirror”
(s)fantastic, grand, howling, marvelous, marvellous, rattling, terrific, tremendous, wonderful, wondrous, phenomenalextraordinarily good or great; used especially as intensifiers“a fantastic trip to the Orient”, “the film was fantastic!”, “a howling success”, “a marvelous collection of rare books”, “had a rattling conversation about politics”, “a tremendous achievement”
(s)fantastic, fantasticalexisting in fancy only“fantastic figures with bulbous heads the circumference of a bushel” (Nathaniel Hawthorne)