This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Third-person singular simple present indicative form of insure.

"Permit me to say, that I know how to write in the approved newspaper style, and to add that my name insures a wide hearing."

insurable   

person    mortal    individual    someone    soul   

insure   

allured    assured    boord    cured    endured