natural philosophy vs acceleration

natural philosophy and acceleration both are nouns.

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

natural philosophy (noun)	acceleration (noun)
the science of matter and energy and their interactions	the act of accelerating; increasing the speed
	an increase in rate of change
	(physics) a rate of increase of velocity