credo vs philosophy

credo and philosophy both are nouns.

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

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

credo: any system of principles or beliefs
philosophy: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of credo include doctrine, ism, philosophical system, school of thought.

credo (noun)	philosophy (noun)
any system of principles or beliefs	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