couple vs natural philosophy

couple and natural philosophy both are nouns.

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

couple (noun)	natural philosophy (noun)
a pair who associate with one another	the science of matter and energy and their interactions
a pair of people who live together
(physics) something joined by two equal and opposite forces that act along parallel lines
two items of the same kind
a small indefinite number

couple (verb)	natural philosophy (verb)
engage in sexual intercourse
link together
bring two objects, ideas, or people together
form a pair or pairs