natural philosophy vs relativity

natural philosophy and relativity both are nouns.

Word	Noun	Adjective	Verb	Adverb
natural philosophy	Yes	No	No	No
relativity	Yes	No	No	No

natural philosophy (noun)	relativity (noun)
the science of matter and energy and their interactions	the quality of being relative and having significance only in relation to something else
	(physics) the theory that space and time are relative concepts rather than absolute concepts