Threadbare and Worn-out

Threadbare adjective - Showing signs of advanced wear and tear and neglect.

Worn-out is a synonym for threadbare in worn topic. In some cases you can use "Worn-out" instead an adjective "Threadbare", when it comes to topics like trite, excite.

Worn-out adjective - Worn or torn into or as if into rags.

Threadbare is a synonym for worn-out in exhausted topic. You can use "Threadbare" instead an adjective phrase "Worn-out", if it concerns topics such as excite.