precept vs philosophical system

precept and philosophical system both are nouns.

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

As nouns, philosophical system is a hypernym of precept; that is, philosophical system is a word with a broader meaning than precept:

precept: a doctrine that is taught
philosophical system: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of precept include doctrine, ism, philosophy, school of thought.

precept (noun)	philosophical system (noun)
a doctrine that is taught	a belief (or system of beliefs) accepted as authoritative by some group or school
rule of personal conduct