crude vs crude oil

crude and crude oil both are nouns.

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

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

Other synonyms of crude include fossil oil, oil, petroleum, rock oil.

crude (noun)	crude oil (noun)
a dark oil consisting mainly of hydrocarbons	a dark oil consisting mainly of hydrocarbons

crude (adjective)	crude oil (adjective)
not refined or processed
belonging to an early stage of technical development; characterized by simplicity and (often) crudeness
conspicuously and tastelessly indecent
not processed or subjected to analysis
devoid of any qualifications or disguise or adornment
not carefully or expertly made