der Stopp
stop
The stopping or interruption of a movement or process.
Der Zug legt in Köln einen kurzen Stopp ein.
The train makes a short stop in Cologne.

stop
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stop
The stopping or interruption of a movement or process.
Der Zug legt in Köln einen kurzen Stopp ein.
The train makes a short stop in Cologne.

The word 'Stopp' comes directly from English and is used in German with the same basic meaning: a halt or an interruption. It is fully integrated into the German language.
Der Busfahrer machte einen plötzlichen Stopp.
The bus driver made a sudden stop.
The phrase 'einen Stopp einlegen' (to make a stop) is a fixed expression. It means to take a planned break during a journey or a longer activity.
Lass uns auf der langen Autofahrt einen Stopp für einen Kaffee einlegen.
Let's make a stop for coffee on the long drive.
You can recognize the exact meaning of 'Stopp' from the context. In connection with means of transport like a bus or train, it usually means a stop. In other contexts, it refers to the interruption of an action or movement.
Der nächste Stopp ist der Hauptbahnhof.
The next stop is the central station.
start
'der Start' and 'der Stopp' are clear opposites. 'der Start' is the beginning of a movement, a journey, a competition, or a process. 'der Stopp' is the stopping or interruption of a movement or process. In technical procedures, traffic, or sports, both words can occur together: first there is a start, later a stop. The important point is: 'Start' means setting off or beginning, while 'Stopp' means stopping or interrupting.

Wegen eines Fehlers gab es einen kurzen Stopp in der Produktion.
Because of an error, there was a short stop in production.
Kurz vor dem Start des Laufs waren alle Teilnehmer sehr konzentriert.
Shortly before the start of the race, all the participants were very focused.