Which to use
“ensure” and “insure” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #2,039
- “ensure” frequency rank
- #17,164
- “insure” frequency rank
- 19203
- confusion score
Side-by-Side Comparison
| Feature | ensure | insure |
|---|---|---|
| Definition | To make sure or certain of something (usually some future event or condition). | To provide for compensation if some specified risk occurs. Often agreed by policy (contract) to offer financial compensation in case of an accident, theft or other undesirable event. |
Where the spellings diverge
Shared letters are muted; the letters that actually set ensure and insure apart are highlighted. They share 5 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
This is the hard kind. ensure and insure are pronounced identically (/ɪnˈʃɔː(ɹ)/) and both work as averb. Neither the ear nor the grammar will rescue you; only the meaning does, so the glosses below are the whole decision. They differ by a single letter - e in “ensure” becomes i in “insure”. Our composite confusion score for this pair is 19203, derived from the frequency rank of both members and their visual similarity.
ensure is recorded at frequency rank #2,039, classified as averb, pronounced /ɪnˈʃɔː(ɹ)/. insure is at rank #17,164, tagged as averb, pronounced /ɪnˈʃɔː(ɹ)/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 19203, this pair ranks #439,772 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ensure vs insure
Shared letters: enrsu. Private to "ensure": -. Private to "insure": i.
"ensure" · 6 letters · shape VCCVCV · "insure" · 6 letters · shape VCCVCV
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "ensure" and "insure" be used interchangeably?
Which is more common, "ensure" or "insure"?
Remembering ensure vs insure
The fastest way to pick the right one every time.
- Read both glosses above and match the meaning you intend, only context separates this pair.
- See each word in full, definition, IPA, etymology and its other confusables. Full “ensure” entry
- Browse more pairs most likely to be confused. Most confusable