accident|noun|something that happens by chance or mistake; an unplanned, often negative event
bullet|noun|a small piece of metal shot from a gun
expand|verb|to make larger; to grow larger
speed|noun|the rate at which something moves or travels; the rate at which something happens or is done
speed|noun|the rate at which something moves or travels; the rate at which something happens or is done
train|verb|to teach or learn how to do something; to prepare for an activity
