groundnut oil vs vegetable oil

groundnut oil and vegetable oil both are nouns.

Word	Noun	Adjective	Verb	Adverb
groundnut oil	Yes	No	No	No
vegetable oil	Yes	No	No	No

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

groundnut oil: an oil from peanuts; used in cooking and making soap
vegetable oil: any of a group of liquid edible fats that are obtained from plants

Other hypernyms of groundnut oil include oil.

groundnut oil (noun)	vegetable oil (noun)
an oil from peanuts; used in cooking and making soap	any of a group of liquid edible fats that are obtained from plants