- lodger, boarder, roomer - a tenant in someone's house
--1 is a kind of tenant, renter
Derived form: verb board3 - boarder - someone who forces their way aboard ship; "stand by to repel boarders"
--2 is a kind of intruder, interloper, trespasser
Derived form: verb board1 - boarder - a pupil who lives at school during term time
--3 is a kind of schoolchild, school-age child, pupil
Derived forms: verb board2, verb board3