Rabbet
Part of speech: noun
Definition: A longitudinal channel, groove, or recess cut out of the edge or face of a plank of wood or other material; especially, one intended to fit another member to form a joint.
Part of speech: verb
Definition: To cut a rabbet in a piece of material.
Rebate
Part of speech: noun
Definition: A deduction from an amount to be paid; an abatementThe return of part of an amount already paidA rectangular groove made to hold two pieces (of wood etc) together; a rabbet
Part of speech: verb
Definition: To deduct or return an amount from a bill or paymentTo diminish or lessen somethingTo cut a rebate (or rabbet) in something