duality vs natural philosophy

duality and natural philosophy both are nouns.

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

duality (noun)	natural philosophy (noun)
(physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory	the science of matter and energy and their interactions
(geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry
being twofold; a classification into two opposed parts or subclasses