Dormitory
Hostel
noun
The kanji and the word are exactly the same. That means they share meanings as well. Can also refer to a hostel.
りょう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
もしこの寮にご両親を宿泊させたいのであれば、この宿泊カードに記入をお願いします。
If you want your parents to stay in this dormitory, could you fill out this registration form?