casein paint vs casein

casein paint and casein both are nouns.

Word	Noun	Adjective	Verb	Adverb
casein paint	Yes	No	No	No
casein	Yes	No	No	No

As nouns, casein paint and casein are synonyms defined as:

casein paint and casein: a water-base paint made with a protein precipitated from milk

casein paint (noun)	casein (noun)
a water-base paint made with a protein precipitated from milk	a water-base paint made with a protein precipitated from milk
	a milk protein used in making e.g. plastics and adhesives