philosophical system vs philosophy

philosophical system and philosophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
philosophical system	Yes	No	No	No
philosophy	Yes	No	No	No

As nouns, philosophical system and philosophy are synonyms defined as:

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

Other synonyms of philosophical system include doctrine, ism, school of thought.

philosophical system (noun)	philosophy (noun)
a belief (or system of beliefs) accepted as authoritative by some group or school	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
	any personal belief about how to live or how to deal with a situation