casino vs cassino

casino and cassino both are nouns.

Word	Noun	Adjective	Verb	Adverb
casino	Yes	No	No	No
cassino	Yes	No	No	No

As nouns, casino and cassino are synonyms defined as:

casino and cassino: a card game in which cards face up on the table are taken with eligible cards in the hand

casino (noun)	cassino (noun)
a card game in which cards face up on the table are taken with eligible cards in the hand	a card game in which cards face up on the table are taken with eligible cards in the hand
a public building for gambling and entertainment