celery salt vs flavouring

celery salt and flavouring both are nouns.

Word	Noun	Adjective	Verb	Adverb
celery salt	Yes	No	No	No
flavouring	Yes	No	No	No

As nouns, flavouring is a hypernym of celery salt; that is, flavouring is a word with a broader meaning than celery salt:

Other hypernyms of celery salt include flavorer, flavoring, flavourer, seasoner, seasoning.

celery salt (noun)	flavouring (noun)
ground celery seed and salt	something added to food primarily for the savor it imparts