nervism vs philosophical system

nervism and philosophical system both are nouns.

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

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

nervism: the philosophical position adopted by Pavlov that all behavioral and physiological processes are regulated by the nervous system.
philosophical system: a belief (or system of beliefs) accepted as authoritative by some group or school

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

nervism (noun)	philosophical system (noun)
the philosophical position adopted by Pavlov that all behavioral and physiological processes are regulated by the nervous system.	a belief (or system of beliefs) accepted as authoritative by some group or school