Verb meaning to make certain, guarantee, or secure an outcome
Any context where you mean 'to make certain' or 'guarantee an outcome'
Verb meaning to arrange financial protection against risk through an insurance policy
Any context involving insurance policies, financial risk protection, or indemnification
Ensure means to make certain that something will happen ('ensure the door is locked'). Insure means to arrange financial compensation against loss or damage, typically through an insurance policy ('insure your car'). In American English, 'ensure' and 'insure' are sometimes used interchangeably, but careful writers maintain the distinction.
Use 'ensure' when you mean 'to make certain or guarantee.' Use 'insure' when you mean 'to obtain or provide insurance coverage.' The distinction matters in legal, financial, and professional writing. 'Assure' (to reassure a person) is a related but separate word.
Choose Ensure if
Any context where you mean 'to make certain' or 'guarantee an outcome'
Choose Insure if
Any context involving insurance policies, financial risk protection, or indemnification
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Ensure
Make certain/guarantee
Insure
Obtain insurance coverage
Ensure
General — any certainty
Insure
Financial — risk protection
Ensure
'Ensure the report is accurate'
Insure
'Insure your home against floods'
Ensure
Preferred for guarantees
Insure
Preferred for coverage
Ensure
Same in both
Insure
British: 'insure' only for insurance
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Both are correct, but in different contexts. 'Ensure' means to make certain ('ensure safety'). 'Insure' means to provide insurance coverage ('insure a vehicle'). Major style guides (AP, Chicago) recommend maintaining this distinction.
Dive deeper with these curated resources
| Attribute | Ensure | Insure |
|---|---|---|
| Monthly Google Searches | 49,500 (for 'ensure vs insure') | 49,500 (same query) |
| Part of Speech | Transitive verb | Transitive verb |
| Related Word | Assure (reassure a person) | Insurance (noun form) |
| First Known Use | 14th century (Middle English) | 15th century (Middle English) |
| AP Style | Use for 'make certain' | Use only for insurance |
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