Sublet

[Sarah]

To underlet; to lease, as when a lessee leases to anotherperson.

[Sarah]

Renting something you're already renting, like college roommates splitting the rent, but only one's on the landowner's contract--the other is subletting

[Julian]

Lease (a property) to a subtenant.

[Lanell]

to allow someone to rent all or part of a house or other building that you are renting from someone else: