Quote:
Originally Posted by Andrew H.
Except for the fact that the words largely are synonyms, meaning that it is no less correct to write "We will leave early to ensure that we arrive on time" than to write "We will leave early to insure that we arrive on time." Both are correct (in AmE). Similarly, "Are these the books you're looking for?" and "I want to first point out some issues with this draft" are both correct despite the final preposition and split infinitive.
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They are not synonyms--while you can use
insure to mean
ensure, you certainly can't do the reverse (you can't
ensure your car).