Assure vs Ensure vs Insure

This 13-question quiz tackles three words that trip up even confident writers: assure, ensure, and insure.

You choose the right one for sentences such as Helmets may ___ the safety of bicycle riders.

An easy way to keep them straight is to ask who or what each one acts on. Assure reassures a person, ensure makes something certain, and insure deals with financial protection like a policy. Sorting them by that question takes most of the guesswork out.

Recommended level: intermediate.