Jamb.
Vertical side post of a window or doorway.

Joint and Several.
This refers to two or more parties who render themselves liable to a joint action against all, as well as to a separate action against each, in cases where an agreement is not kept.

Joint Mortgage.
A mortgage where there is more than one individual named on the contract..

Joint Sole Agency.
Two agents take your property onto their books and they agree to split the commission between themselves, whoever actually arranges the sale.

Joint Tenants.
Two or more people holding property as co-owners. When one dies, his or her share of the property automatically passes to the survivor or survivors.

Joist.
A beam that supports a ceiling or floor.

Joist hanger.
A fabricated metal slot installed in a wall to keep a joist securely in position.