what is the difference between delivarables and Release notes?

what is the difference between delivarables and Release notes? 
Release notes are provided for every new release of the build with fixed bugs. It contains what are all the bugs fixed and what are pending bugs.
Deliverables are provided at the end of the testing. Test plan, test cases, defect reports, documented defects which are not fixed etc come under deliverables.

what is a testcase and usecase ?
Use case is a description of a certain feature of an application in terms of actors ,actions and responses.
For example if the user enters valid userid and password and after clicking on login button the system should display home page.
Here the user is ACTOR. The operations performed by him are ACTIONS. The Systems display of home page is RESPONSE.

Actually using use cases we will write our test cases if any use cases are provided in the SRS.
A test case is a set of test inputs,executional conditions,with some expected results developed for validating a particular functionality of AUT.