[1] : WordNet (r) 2.0

idol worship
     n : the worship of idols; the worship of images that are not god
         syn: idolatry
see also:
idolatry 

[2] : Moby Thesaurus II by Grady Ward, 1.0

28 moby thesaurus words for "idol worship":
   druidism, parsiism, sabaism, zoroastrianism, animal worship,
   demonism, demonolatry, devil worship, fetishism, fire worship,
   heathenism, hero worship, iconoduly, iconolatry, idolatrousness,
   idolatry, idolism, idolodulia, idolomancy, image worship, paganism,
   phallic worship, phallicism, pyrolatry, snake worship,
   star worship, sun worship, tree worship

Worship >> W Words
Worship, definition of term: Worship
worship_pag1.html

Idol >> I Words
Idol, definition of term: Idol
idol_pag1.html