RE: Vocab-ability Prefix–270 (co__, com__, con__ = together, with) – A More Powerful Vocabulary (earn UpVotes with “Vocab Practice” exercise)

Copilot
The copilot was the first to spot the enemy plane, now the whole crew had to quickly prepare for a gun battle.
Cooperate
The corrupt officer urged us to cooperate with him so he could cut us a shear out of the stollen money, but we all refused.
Colleague
I prefer to work with my colleagues at school in preparation for the competition, rather than some strangers.
Collapse
It's a pity the building collapsed due to poor supervision and the use of substandard building materials, the engineers would be held accountable for this.
Communicate
Its really difficult to get across Jane on phone, am finding it hard to communicate properly due to the stormy weather.