subjective vs philosophy

subjective is not a noun while philosophy is a noun.

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

subjective (noun)	philosophy (noun)
	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

subjective (adjective)	philosophy (adjective)
taking place within the mind and modified by individual bias
of a mental act performed entirely within the mind