cayenne pepper vs flavoring

cayenne pepper and flavoring both are nouns.

Word	Noun	Adjective	Verb	Adverb
cayenne pepper	Yes	No	No	No
flavoring	Yes	No	No	No

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

cayenne pepper: ground pods and seeds of pungent red peppers of the genus Capsicum
flavoring: something added to food primarily for the savor it imparts

Other hypernyms of cayenne pepper include flavorer, flavourer, flavouring, seasoner, seasoning.

cayenne pepper (noun)	flavoring (noun)
ground pods and seeds of pungent red peppers of the genus Capsicum	something added to food primarily for the savor it imparts
a long and often twisted hot red pepper
plant bearing very hot and finely tapering long peppers; usually red