oil vs oil colour

oil and oil colour both are nouns.

Word	Noun	Adjective	Verb	Adverb
oil	Yes	No	Yes	No
oil colour	Yes	No	No	No

As nouns, oil and oil colour are synonyms defined as:

oil and oil colour: oil paint containing pigment that is used by an artist

Other synonyms of oil include oil color.

oil (noun)	oil colour (noun)
oil paint containing pigment that is used by an artist	oil paint containing pigment that is used by an artist
any of a group of liquid edible fats that are obtained from plants
a slippery or viscous liquid or liquefiable substance not miscible with water
a dark oil consisting mainly of hydrocarbons

oil (verb)	oil colour (verb)
administer an oil or ointment to; often in a religious ceremony of blessing
cover with oil, as if by rubbing