Which to use
“surely” is an adverb and “surety” is a noun - they look or sound alike but fill different roles in a sentence.
- #2,766
- “surely” frequency rank
- #36,360
- “surety” frequency rank
- 39126
- confusion score
Side-by-Side Comparison
| Feature | surely | surety |
|---|---|---|
| Definition | Without fail. | Certainty. |
Where the eye mixes surely and surety
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. surely and surety follow the identical consonant-vowel pattern (CVCVCV). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between surely and surety
These two trip readers on the page rather than in the ear: surely is /ˈʃɔːli/ while surety is /ˈʃɔːɹɪti/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - l in “surely” becomes t in “surety”, and the parts of speech differ too (adverb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 39126, derived from the frequency rank of both members and their visual similarity.
surely is recorded at frequency rank #2,766, classified as anadv, pronounced /ˈʃɔːli/. surety is at rank #36,360, tagged as anoun, pronounced /ˈʃɔːɹɪti/.
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 39126, this pair ranks #279,581 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of surely vs surety
Shared letters: ersuy. Private to "surely": l. Private to "surety": t.
"surely" · 6 letters · shape CVCVCV · "surety" · 6 letters · shape CVCVCV
Known mistypes of this pair
Frequently Asked Questions
Do "surely" and "surety" mean the same thing in a sentence?
Which is more common, "surely" or "surety"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "surely" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "surety" - compare definitions side by side with the headword page. Word entry
- This pair ranks #279,581 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "surely" and "surety" also get mixed up with nearby pairs, the highest-scored neighbour is "surety vs surry". 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 #279,581 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.