1. an accident in which two or more people or vehicles hit

2. a strong disagreement between two people or groups

Invaders - people or soldiers who enter a country or town by force in order to take control of it

miss - not go somewhere, to be too late for something

prevent -to stop something from happening

satellite - a machine that  goes around the Earth, Moon , used for radio, television, and other electronic communication

option -  a choice you can make in a particular situation

Collision

an accident that happens when two vehicles hit each other with force:

There has been a collision on the southbound stretch of the motorway.

Two drivers were killed in a head-on (= direct) collision between a car and a taxi last night.

The cyclist was in a collision with a bus.