[1] : WordNet (r) 2.0

crude oil
     n : a dark oil consisting mainly of hydrocarbons syn: petroleum,
          crude, rock oil, fossil oil
see also:
petroleum crude rock oil fossil oil 

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

19 moby thesaurus words for "crude oil":
   avgas, crude, ethyl, ethyl gas, fossil oil, gas, gasoline,
   high-octane gas, high-test, kerosene, lead-free gas, low-lead gas,
   motor oil, paraffin, petrol, petroleum, premium gas, regular,
   rock oil

Cod Oil >> C Words
Cod Oil, definition of term: Cod Oil
cod+oil_pag1.html

Cod-Liver Oil >> C Words
Cod-Liver Oil, definition of term: Cod-Liver Oil
cod-liver+oil_pag1.html

Coconut Oil >> C Words
Coconut Oil, definition of term: Coconut Oil
coconut+oil_pag1.html

Castor Oil >> C Words
Castor Oil, definition of term: Castor Oil
castor+oil_pag1.html

Banana Oil >> B Words
Banana Oil, definition of term: Banana Oil
banana+oil_pag1.html

Camphor Oil >> C Words
Camphor Oil, definition of term: Camphor Oil
camphor+oil_pag1.html

Baby Oil >> B Words
Baby Oil, definition of term: Baby Oil
baby+oil_pag1.html