The Italian term "decadenza, decorso" matches the English term "expiration"

other italian words that include "decadenza" : english :
decadenza dilapidation
decadenza disrepair
decadenza, naufragio downfall
other italian words that include "decorso" : english :
quotazione, decorso, tratto, itinerario course
decorso expiry
emissario, decorso flowing off