aristocracy vs samurai

aristocracy and samurai both are nouns.

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

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

Other hyponyms of aristocracy include noblesse, baronage, peerage, baronetage, knighthood.

aristocracy (noun)	samurai (noun)
a privileged class holding hereditary titles	feudal Japanese military aristocracy
the most powerful members of a society	a Japanese warrior who was a member of the feudal military aristocracy