II vs deuce

II and deuce both are nouns.

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

As nouns, II and deuce are synonyms defined as:

II and deuce: the cardinal number that is the sum of one and one or a numeral representing this number

Other synonyms of II include 2, two.

II (noun)	deuce (noun)
the cardinal number that is the sum of one and one or a numeral representing this number	one of the four playing cards in a deck that have two spots
	a word used in exclamations of confusion
	the cardinal number that is the sum of one and one or a numeral representing this number
	a tie in tennis or table tennis that requires winning two successive points to win the game