natural philosophy vs conservation

natural philosophy and conservation both are nouns.

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

natural philosophy (noun)	conservation (noun)
the science of matter and energy and their interactions	the preservation and careful management of the environment and of natural resources
	(physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations
	an occurrence of improvement by virtue of preventing loss or injury or other change