Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun collusion

2 senses of collusion

Sense 1
collusion -- (secret agreement)
       => agreement, arrangement -- (the thing arranged or agreed to; "they made arrangements to meet in Chicago")

Sense 2
connivance, collusion -- (agreement on a secret plot)
       => agreement -- (the verbal act of agreeing)