Source : Webster's Revised Unabridged Dictionary (1913)

Overjealous \O`ver*jeal"ous\, a. [Over + jealous. Cf.
   {Overzealous}.]
   Excessively jealous; too jealous.

Source : WordNet®

overjealous
     adj : suspicious or unduly suspicious or fearful of being
           displaced by a rival; "a jealous lover" [syn: {jealous},
            {green-eyed}]