1. Molestation.

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

• minifestation,
• ingestation,
• investiation,
• invesitation,
• investgation,
• invertation,
• investagtion,
• insertation,
• invetation,
• inventation,
• ifestation,
• infeststion,
• mainfestation,
• investition,
• infautation,
• infestion,
• infestiation,
• investation,
• infestatoon,
• infestaion

• ineffectual,
• ineffectuality,
• investigation,
• infix notation,
• investor,
• invocation,
• ineffectually,
• investing,
• infested,
• infectious,
• invested,
• infection,
• investment,
• infectiously.

The adjective form of the word "infestation" is "infested".

The plural of the "infestation" can be the "infestations".

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