pennyroyal oil vs oil

pennyroyal oil and oil both are nouns.

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

As nouns, oil is a hypernym of pennyroyal oil; that is, oil is a word with a broader meaning than pennyroyal oil:

pennyroyal oil: oil from European pennyroyal having an odor like mint; used chiefly in soaps
oil: a slippery or viscous liquid or liquefiable substance not miscible with water

As nouns, oil is a hypernym of pennyroyal oil; that is, oil is a word with a broader meaning than pennyroyal oil:

pennyroyal oil: aromatic oil from American pennyroyal
oil: a slippery or viscous liquid or liquefiable substance not miscible with water

pennyroyal oil (noun)	oil (noun)
oil from European pennyroyal having an odor like mint; used chiefly in soaps	oil paint containing pigment that is used by an artist
aromatic oil from American pennyroyal	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

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