work [synonym - ergomania] => [ergasio- or ergo-] (Greek) meaning 'work'.
excessive desire to work; ergomania
<psychiatry> Morbid or obsessive need to work. ... Origin: G. Ergasia, work, + mania, insanity ... (05 Mar 2000) ... 
ergasiomania 1. A compulsion to work or to be active; a morbid need to work. 2. Undue eagerness to perform surgery.