Which to use
“aspire” and “assure” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #15,572
- “aspire” frequency rank
- #6,438
- “assure” frequency rank
- 22010
- confusion score
Side-by-Side Comparison
| Feature | aspire | assure |
|---|---|---|
| Definition | To have a strong desire or ambition to achieve something. | To make sure and secure; ensure. |
Where the eye mixes aspire and assure
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. aspire and assure follow the identical consonant-vowel pattern (VCCVCV). Same shape at a glance is often the real trap, independent of shared letters.
Why the eye confuses aspire with assure
A purely visual mix-up. aspire (/əˈspaɪə(ɹ)/) and assure (/əˈʃɔː(ɹ)/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 22010, derived from the frequency rank of both members and their visual similarity.
aspire is recorded at frequency rank #15,572, classified as averb, pronounced /əˈspaɪə(ɹ)/. assure is at rank #6,438, tagged as averb, pronounced /əˈʃɔː(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 22010, this pair ranks #419,731 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of aspire vs assure
Shared letters: aers. Private to "aspire": ip. Private to "assure": u.
"aspire" · 6 letters · shape VCCVCV · "assure" · 6 letters · shape VCCVCV
Known mistypes of this pair
Frequently Asked Questions
Can "aspire" and "assure" be used interchangeably?
Which is more common, "aspire" or "assure"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "aspire" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "assure" - compare definitions side by side with the headword page. Word entry
- This pair ranks #419,731 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "aspire" and "assure" also get mixed up with nearby pairs, the highest-scored neighbour is "assuage vs assure". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #419,731 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.