Obed = "serving"
derivation: of Hebrew origin (05744)
http://bible.crosswalk.com/Lexicons/Greek/grk.cgi?number=5601&version=kjv

(05744)
Obed = "serving"
derivation: act part of (05647)
http://bible.crosswalk.com/Lexicons/Hebrew/heb.cgi?number=5744&version=kjv

(05647)
1] to work, serve
   1.a] (Qal)
       1.a.1] to labour, work, do work
       1.a.2] to work for another, serve another by labour
       1.a.3] to serve as subjects
       1.a.4] to serve (God)
       1.a.5] to serve (with Levitical service)
   1.b] (Niphal)
       1.b.1] to be worked, be tilled (of land)
       1.b.2] to make oneself a servant
   1.c] (Pual) to be worked
   1.d] (Hiphil)
       1.d.1] to compel to labour or work, cause to labour, cause to serve
       1.d.2] to cause to serve as subjects
   1.e] (Hophal) to be led or enticed to serve
http://bible.crosswalk.com/Lexicons/Hebrew/heb.cgi?number=5647&version=kjv

A link to each occurrence of this word in the homepage:
1] Obed