butter vs dairy product

butter and dairy product both are nouns.

Word	Noun	Adjective	Verb	Adverb
butter	Yes	No	Yes	No
dairy product	Yes	No	No	No

As nouns, dairy product is a hypernym of butter; that is, dairy product is a word with a broader meaning than butter:

butter: an edible emulsion of fat globules made by churning milk or cream; for cooking and table use
dairy product: milk and butter and cheese

Other hypernyms of butter include food, solid food.

butter (noun)	dairy product (noun)
an edible emulsion of fat globules made by churning milk or cream; for cooking and table use	milk and butter and cheese
a fighter who strikes the opponent with his head

butter (verb)	dairy product (verb)
spread butter on