When there's a wound, the end result is a thrombus or thrombosis?
Here are a couple of distinctions,

1) The thrombus is the actual blood clot

2) Thrombosis is the condition of having a clot form in the blood vessel.

3) If the thrombus breaks away and becomes capable of traveling to some distant site, we refer to that as an embolus.

4) If the embolus lodges somewhere disrupting blood flow, we call that embolism, or in the case of a thrombus, thromboembolism.

So referring here, a protein called tissue factor is expressed on the outside of blood vessels, and when ruptured, is exposed to the blood stream that carries Factor VII. This initiates the coagulation response, and through the action of these factors you get platelets sticking to the endothelium, thrombin cleaving fibrinogen to fibrin that sticks to the platelets, and the fibrin/platelet plug forming over the wound is like a gel and RBCs become mired in it. So really, the thrombus is stuck to the endothelial wall.