るすい
留守居 caretaker or keeper (official post in the Edo era)

るすたく
留守宅 house where the family is out

るすちゅう
留守中 during absence from home

るすでん
留守電 answering machine

るすばん
留守番 care-taking caretaker house-watching

るすばんでんわ
留守番電話 answering machine

るすろく
留守録 unattended (video, audio) recording