sustenance vs kosher

sustenance and kosher both are nouns.

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

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

sustenance (noun)	kosher (noun)
the act of sustaining life by food or providing a means of subsistence	food that fulfills the requirements of Jewish dietary law
a source of materials to nourish the body
the financial means whereby one lives

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