1. To practise making insurance.

2. To make sure or secure; to contract for a premium to secure against loss.

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

• ensur,
• inusured,
• insie,
• ensiure,
• unsurte,
• insues,
• tensure,
• enshure,
• ingore,
• amsure,
• unsured,
• usure,
• unure,
• answre,
• incure,
• inusre,
• insurean,
• asure,
• insuide,
• nsure

• ingress,
• ingres,
• inquire,
• insured,
• inquiring,
• inquiry,
• incorrect,
• injury,
• insurgent,
• insurance,
• injured,
• in series,
• incur,
• insurer,
• insures,
• inquirer,
• increment,
• inshore,
• incurring,
• increase,
• increased,
• injure,
• inger,
• unsure,
• incurved,
• ensure,
• Insurable.

The adverb for the word "insure" is "insuringly".

The adjective form of the word "insure" is "insured".

The plural form of the word "insure" is "insures"

The singular form of the word "insure" is "insures"