lubricating oil vs grease

lubricating oil and grease both are nouns.

Word	Noun	Adjective	Verb	Adverb
lubricating oil	Yes	No	No	No
grease	Yes	No	Yes	No

As nouns, lubricating oil and grease are synonyms defined as:

lubricating oil and grease: a thick fatty oil (especially one used to lubricate machinery)

lubricating oil (noun)	grease (noun)
a thick fatty oil (especially one used to lubricate machinery)	anything regarded as making something unclean
	a thick fatty oil (especially one used to lubricate machinery)

lubricating oil (verb)	grease (verb)
	lubricate with grease