nihilism vs doctrine

nihilism and doctrine both are nouns.

Word	Noun	Adjective	Verb	Adverb
nihilism	Yes	No	No	No
doctrine	Yes	No	No	No

As nouns, doctrine is a hypernym of nihilism; that is, doctrine is a word with a broader meaning than nihilism:

nihilism: a revolutionary doctrine that advocates destruction of the social system for its own sake
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of nihilism include ism, philosophical system, philosophy, school of thought.

nihilism (noun)	doctrine (noun)
a revolutionary doctrine that advocates destruction of the social system for its own sake	a belief (or system of beliefs) accepted as authoritative by some group or school
complete denial of all established authority and institutions
the delusion that things (or everything, including the self) do not exist; a sense that everything is unreal