proper vs kosher

proper is not a noun while kosher is a noun.

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

proper (noun)	kosher (noun)
	food that fulfills the requirements of Jewish dietary law

proper (adjective)	kosher (adjective)
marked by suitability or rightness or appropriateness	conforming to Jewish dietary laws
appropriate for a condition or purpose or occasion or a person's character, needs	proper or legitimate
having all the qualities typical of the thing specified
limited to the thing specified