Answer: boarding

AnswerCrossword Clue
BOARDINGHockey penalty for knocking a player into the side of the rink
boardingThe action of getting on or into a ship, aircraft, or other vehicle
boardingthe act of boarding a ship etc
boardingLong, flat, thin pieces of wood used to build or cover something
boardingThe procedure according to which students live at school during the semester in return for payment