canola vs vegetable oil

canola and vegetable oil both are nouns.

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

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

canola: vegetable oil made from rapeseed; it is high in monounsaturated fatty acids
vegetable oil: any of a group of liquid edible fats that are obtained from plants

Other hypernyms of canola include oil.

canola (noun)	vegetable oil (noun)
vegetable oil made from rapeseed; it is high in monounsaturated fatty acids	any of a group of liquid edible fats that are obtained from plants