He was accused of being a conspirant.

The conspirator was arrested for planning the attack.

The conspirers were planning a coup.

The conspirer was caught red-handed.

The conspirings of the group were finally exposed.

He believed in the conspirancy theory.

The conspirants gathered in secret to plan their next move.

He gave me a conspirative look.

The co-conspirator was arrested along with the main suspect.

The co-conspirators were arrested for their involvement in the crime.