loaner (of item loaned).

Jaws III was a loner and would kill anything including other crocs which fell into his pit.

It helped him wonderfully when the loaf was small on his table, He had but little time to read it when the sun was up, and it took him loner to read a little, for he learned the letters when he was old.

This in itself was a novel experience, for the ex-convict had been a "loner" all his-life, and had never really liked any one.

He's a loner, like so many of the asteroid miners.