relaxation vs natural philosophy

relaxation and natural philosophy both are nouns.

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

relaxation (noun)	natural philosophy (noun)
freedom from activity (work or strain or responsibility)	the science of matter and energy and their interactions
the act of making less strict
a method of solving simultaneous equations by guessing a solution and then reducing the errors that result by successive approximations until all the errors are less than some specified amount
an occurrence of control or strength weakening
a feeling of refreshing tranquility and an absence of tension or worry
(physics) the exponential return of a system to equilibrium after a disturbance
(physiology) the gradual lengthening of inactive muscle or muscle fibers