philosophy vs school of thought

philosophy and school of thought both are nouns.

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

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

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

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

philosophy (noun)	school of thought (noun)
the rational investigation of questions about existence and knowledge and ethics	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
any personal belief about how to live or how to deal with a situation