1. A secret compact for a fraudulent purpose. See Collude.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• pollusion,
• collusions,
• colution,
• dellusion,
• colusion,
• cousion,
• oclusion,
• colletion,
• collestion,
• collecion,
• cofusion,
• conlusion,
• coclusion,
• collasion,
• collosion,
• lllusion,
• collution,
• callision,
• coalision,
• collission

• coalescence,
• Colossians,
• coleson,
• Colossian,
• collison,
• Colson,
• colosimo,
• coalescency,
• Coulson,
• collision.

The adjective form of the word "collusion" is "collusive".

The plural of the "collusion" can be the "collusions".

The singular of the "collusion" can be the "collusion".