confrontation
She wanted to avoid another confrontation with her father.
congressman
There's not much prospect of Mr Smith's being elected as Congressman.
constrain
"People with poor motives will always exist," he says. "Sometimes environments constrain those people and sometimes environments give those people opportunity." “
contamination
We must pay much attention to the contamination of the water supply.
correlation
People believe that there is a correlation between smoking and lung cancer.
credible
A will must be attested by two or more credible witnesses.