Answer:

CIAO

Answer	Crossword Clue
CIAO	"Later!"
CIAO	Bologna bye
CIAO	Genoa good-bye

CIAO	Venice farewell!
CIAO	"Later, alligator"
CIAO	Arrivederci
CIAO	Slangy good-bye
CIAO	"Later," to the jet set
CIAO	Berlusconi's farewell
CIAO	"TTYL"
CIAO	Aloha, in Roma

CIAO	Florentine farewell
CIAO	"Buon giorno!"
CIAO	"Arrivederci"
CIAO	Farewell
CIAO	See you in Rome?
CIAO	"See ya"
CIAO	""Arrivederci!""
CIAO	"'Arrivederci'"

CIAO	Tuscan ta-ta
CIAO	"A domani!"
CIAO	Arty farewell
CIAO	Bologna greeting
CIAO	Genoan greeting
CIAO	Continental farewell
CIAO	"Later," to Luigi
CIAO	Firenze farewell

CIAO	"Ta ta!"
CIAO	So long, in Salerno
CIAO	"Later"
CIAO	"So long!"
CIAO	Good-bye, in Rome
CIAO	Italian hello
CIAO	Parting word
CIAO	Roman hello

CIAO	Roman greeting
CIAO	Trendy parting
CIAO	"See ya!"
CIAO	Italian's "So long"
CIAO	"Bye!"

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.