Japanese vs samurai

Japanese and samurai both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese	Yes	Yes	No	No
samurai	Yes	No	No	No

Japanese (noun)	samurai (noun)
the language (usually considered to be Altaic) spoken by the Japanese	feudal Japanese military aristocracy
a native or inhabitant of Japan	a Japanese warrior who was a member of the feudal military aristocracy

Japanese (adjective)	samurai (adjective)
of or relating to or characteristic of Japan or its people or their culture or language