metaphysics vs philosophy

metaphysics and philosophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
metaphysics	Yes	No	No	No
philosophy	Yes	No	No	No

As nouns, philosophy is a hypernym of metaphysics; that is, philosophy is a word with a broader meaning than metaphysics:

metaphysics: the philosophical study of being and knowing
philosophy: the rational investigation of questions about existence and knowledge and ethics

metaphysics (noun)	philosophy (noun)
the philosophical study of being and knowing	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