dualism vs doctrine

dualism and doctrine both are nouns.

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

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

dualism: the doctrine that reality consists of two basic opposing elements, often taken to be mind and matter (or mind and body), or good and evil
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school

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

dualism (noun)	doctrine (noun)
the doctrine that reality consists of two basic opposing elements, often taken to be mind and matter (or mind and body), or good and evil	a belief (or system of beliefs) accepted as authoritative by some group or school