Spend the night is a phrase used to describe an overnight STAY at a place. It can be used to refer to staying in a hotel, a friend's house, or any other place where one would STAY for the night. The crossword solutions for this phrase are STAY (4 letters), ROOST (5 letters), and STAYOVER (8 letters). STAY is a verb meaning to remain in a place for a period of time, ROOST is a noun meaning a place where one sleeps or rests, and STAYOVER is a noun meaning an overnight STAY.