wintergreen oil vs flavoring

wintergreen oil and flavoring both are nouns.

Word	Noun	Adjective	Verb	Adverb
wintergreen oil	Yes	No	No	No
flavoring	Yes	No	No	No

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

wintergreen oil: oil or flavoring obtained from the creeping wintergreen or teaberry plant
flavoring: something added to food primarily for the savor it imparts

Other hypernyms of wintergreen oil include flavorer, flavourer, flavouring, seasoner, seasoning.

wintergreen oil (noun)	flavoring (noun)
oil or flavoring obtained from the creeping wintergreen or teaberry plant	something added to food primarily for the savor it imparts