collusion

About 1.29 uses per million words.

Meaning

1. noun A private, cooperative agreement or arrangement between groups that otherwise maintain the pretense of competition, contention or non-cooperation.
2. noun A private agreement for a fraudulent or illegal purpose; conspiracy.

Similar words

connivance conspiracy complicit complicity abetment accomplice accessory acquiescence privity convenience

Often followed by

with between of and in is or among to

Word family

collusions collusive collusively