The Collaborative International Dictionary of English v.0.48:

Joke \Joke\, v. t. [imp. & p. p. Joked; p. pr. & vb. n.
   Joking.]
   To make merry with; to make jokes upon; to rally; to banter;
   as, to joke a comrade.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

joking \joking\ adj.
   intended as a joke; -- of communications.

   Syn: jesting, jocose, jocular, jocund.
        [WordNet 1.5 +PJC]

   no joking matter a serious matter.
      [PJC]

WordNet (r) 3.0 (2006):

joking
    adj 1: characterized by jokes and good humor [syn: jesting,
           jocose, jocular, joking]

Moby Thesaurus II by Grady Ward, 1.0:

60 Moby Thesaurus words for "joking":
   Attic, bantering, biting, brilliance, brilliant, chaffing, clever,
   cleverness, droll, facetious, facetiousness, fooling, funniness,
   funny, hazing, humorous, humorousness, humorsome, jesting, jocose,
   jocoseness, jocular, jocularity, joky, jollying, joshing, keen,
   keen-witted, keen-wittedness, keenness, kidding, mordant,
   nimble-witted, nimble-wittedness, pleasantry, pointed, pungency,
   pungent, quick-witted, quick-wittedness, ragging, rapier-like,
   razzing, ribbing, roasting, salt, saltiness, salty, scintillating,
   sharp, sharpness, smart, smartness, sparkling, sprightly, teasing,
   twitting, whimsical, wittiness, witty