In mass starts, all of the dog teams start simultaneously.
But the fire seems to have started simultaneously in three different places.
A group of four skiers start simultaneously and attempt to reach the end of the course.
And the drugs must be started simultaneously to avoid drug resistance.
It'd be just too much of a coincidence if the two fires started simultaneously from separate causes.
I'd say the fire started in at least four or five places simultaneously.
Since it started in three different locations simultaneously, the cause was clearly arson.
The trials start simultaneously and both prosecutors must fight for a conviction before the other can destroy their case.
The company simultaneously started operations in seven more cities.
Teams start simultaneously and skiers get eight chances to make five shots from 50 meters.