perturbation vs natural philosophy

perturbation and natural philosophy both are nouns.

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

perturbation (noun)	natural philosophy (noun)
the act of causing disorder	the science of matter and energy and their interactions
a disposition that is confused or nervous and upset
activity that is a malfunction, intrusion, or interruption
(physics) a secondary influence on a system that causes it to deviate slightly
an unhappy and worried mental state