dualism vs school of thought

dualism and school of thought both are nouns.

Word	Noun	Adjective	Verb	Adverb
dualism	Yes	No	No	No
school of thought	Yes	No	No	No

As nouns, school of thought is a hypernym of dualism; that is, school of thought 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
school of thought: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of dualism include doctrine, ism, philosophical system, philosophy.

dualism (noun)	school of thought (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