coimpact
nounUK /ˌkəʊˈɪmpækt/
US /ˌkoʊˈɪmpækt/
A coimpact is when two things hit each other and both get changed.
The coimpact of the two balls made them bounce apart.
OTHER MEANINGS
2. The shared effect that two or more things have on each other.
The coimpact of the two ideas made the project better.
3. A result that happens because two forces meet.
The coimpact of wind and rain knocked down the small tree.
4. To hit something at the same time as something else hits it.
The two waves coimpacted on the shore.