doctrine vs school of thought

doctrine and school of thought both are nouns.

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

As nouns, doctrine and school of thought are synonyms defined as:

doctrine and school of thought: a belief (or system of beliefs) accepted as authoritative by some group or school

Other synonyms of doctrine include ism, philosophical system, philosophy.

doctrine (noun)	school of thought (noun)
a belief (or system of beliefs) accepted as authoritative by some group or school	a belief (or system of beliefs) accepted as authoritative by some group or school