nutrition vs kosher

nutrition and kosher both are nouns.

Word	Noun	Adjective	Verb	Adverb
nutrition	Yes	No	No	No
kosher	Yes	Yes	No	No

As nouns, kosher is a hyponym of nutrition; that is, kosher is a word with a more specific, narrower meaning than nutrition:

nutrition (noun)	kosher (noun)
the scientific study of food and drink (especially in humans)	food that fulfills the requirements of Jewish dietary law
a source of materials to nourish the body
(physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance

nutrition (adjective)	kosher (adjective)
	conforming to Jewish dietary laws
	proper or legitimate