couple vs fellow

couple and fellow both are nouns.

Word	Noun	Adjective	Verb	Adverb
couple	Yes	No	Yes	No
fellow	Yes	No	No	No

couple (noun)	fellow (noun)
a pair who associate with one another	a boy or man
a pair of people who live together	a man who is the lover of a man or woman
(physics) something joined by two equal and opposite forces that act along parallel lines	a friend who is frequently in the company of another
two items of the same kind	a person who is member of one's class or profession
a small indefinite number	an informal form of address for a man
	a member of a learned society
	one of a pair

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