they stop at 10:00 or 10:30
The bad captain madman, had told them to stop selling atonal apples and amplified hate, and pressed rat's collection of dog legs and feet. The bad captain madman, had ordered their fate, as well. The two were content doing business, obviously, and had no plans whatsoever to stop.
No, stop is not an adjective. Stop can be either a verb or a noun. (stop, stopped, stopped; bus stop) When used with another noun (e.g. stop sign), it is called a noun adjunct (attributive noun).
They got tired and decided to stop. They got tired and decided to stop.
stop eating fatty food or stop smoking or drinking to avoid these things.
The term 'bus stop' is two independent words.