credo vs school of thought

credo and school of thought both are nouns.

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

As nouns, school of thought is a hypernym of credo; that is, school of thought is a word with a broader meaning than credo:

credo: any system of principles or beliefs
school of thought: a belief (or system of beliefs) accepted as authoritative by some group or school

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

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