[syn: amusing, comic, comical, funny, laughable, mirthful, risible]
The Collaborative International Dictionary of English v.0.48:
Mirthful \Mirth"ful\, a.
   1. Full of mirth or merriment; merry; as, mirthful children.
      [1913 Webster]
   2. Indicating or inspiring mirth; as, a mirthful face.
      [1913 Webster]
            Mirthful, comic shows.                --Shak.
      [1913 Webster] -- Mirth"ful*ly, adv. --
      Mirth"ful*ness, n.
      [1913 Webster]
WordNet (r) 3.0 (2006):
mirthful
    adj 1: full of or showing high-spirited merriment; "when hearts
           were young and gay"; "a poet could not but be gay, in
           such a jocund company"- Wordsworth; "the jolly crowd at
           the reunion"; "jolly old Saint Nick"; "a jovial old
           gentleman"; "have a merry Christmas"; "peals of merry
           laughter"; "a mirthful laugh" [syn: gay, jocund,
           jolly, jovial, merry, mirthful]
    2: arousing or provoking laughter; "an amusing film with a
       steady stream of pranks and pratfalls"; "an amusing fellow";
       "a comic hat"; "a comical look of surprise"; "funny stories
       that made everybody laugh"; "a very funny writer"; "it would
       have been laughable if it hadn't hurt so much"; "a mirthful
       experience"; "risible courtroom antics" [syn: amusing,
       comic, comical, funny, laughable, mirthful,
       risible]
Moby Thesaurus II by Grady Ward, 1.0:
20 Moby Thesaurus words for "mirthful":
   blithe, blithesome, buxom, festive, frivolous, gay, gleeful,
   hilarious, jocular, jocund, jolly, jovial, joyful, joyous,
   laughter-loving, lighthearted, merry, mirth-loving, rejoicing,
   risible