deuce vs couple

deuce and couple both are nouns.

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

As nouns, couple is a hyponym of deuce; that is, couple is a word with a more specific, narrower meaning than deuce:

deuce: the cardinal number that is the sum of one and one or a numeral representing this number
couple: two items of the same kind

Other hyponyms of deuce include craps, snake eyes, brace, couplet, distich, duad, duet, duo, dyad, pair, span, twain, twosome, yoke.

deuce (noun)	couple (noun)
one of the four playing cards in a deck that have two spots	a pair who associate with one another
a word used in exclamations of confusion	a pair of people who live together
the cardinal number that is the sum of one and one or a numeral representing this number	(physics) something joined by two equal and opposite forces that act along parallel lines
a tie in tennis or table tennis that requires winning two successive points to win the game	two items of the same kind
	a small indefinite number

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