This is the 11767th most frequent Russian word.
заказаны
"Ordered" or "reserved."
The word 'заказаны' here functions as the past passive participle describing tickets that have been ordered.
Эти билеты были заказаны заранее.
These tickets were ordered in advance.
In this sentence, 'заказаны' is used to indicate that the action of booking has been completed for the hotel rooms.
Номера в гостинице уже заказаны.
The hotel rooms are already booked.
Here, 'заказанные' is an adjective form (participle) derived from the verb 'заказывать,' describing the items that have been ordered.