surety vs surly, What's the Difference?

Which to use

“surety” is a noun and “surly” is an adjective - they look or sound alike but fill different roles in a sentence.

#36,360
“surety” frequency rank: #35,102
“surly” frequency rank: 71462
confusion score

Side-by-Side Comparison

Feature	surety	surly
Definition	Certainty.	Irritated, bad-tempered, unfriendly.

Where the spellings diverge

Shared letters are muted; the letters that actually set surety and surly apart are highlighted. They share 4 letters in sequence, which is exactly why the eye skips the difference.

6 ch

surety

5 ch

surly

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: surety is /ˈʃɔːɹɪti/ while surly is /ˈsɜːli/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 71462, derived from the frequency rank of both members and their visual similarity.

surety is recorded at frequency rank #36,360, classified as anoun, pronounced /ˈʃɔːɹɪti/. surly is at rank #35,102, tagged as anadj, pronounced /ˈsɜːli/.

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 71462, this pair ranks #46,611 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of surety vs surly

Shared letters: rsuy. Private to "surety": et. Private to "surly": l.

"surety" · 6 letters · shape CVCVCV · "surly" · 5 letters · shape CVCCV

Known mistypes of this pair

surety ← sruety · ssurety · suerty · suretty · suretyy · sureyt · surrety · surtey
surly ← sruly · ssurly · sulry · surlly · surlyy · surrly · suryl · usrly

Frequency comparison

surety#36,360

surly#35,102

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "surety" and "surly" be used interchangeably?

No - they are not even the same part of speech. "surety" is a noun and "surly" an adjective, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "surety" or "surly"?

"surly" is the more common of the two: it sits at frequency rank #35,102 in our English list, against #36,360 for "surety". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering surety vs surly

The fastest way to pick the right one every time.

Check the role first: if you need a noun, it's “surety”; for an adjective, it's “surly”.
See each word in full, definition, IPA, etymology and its other confusables. Full “surety” entry
Browse more pairs most likely to be confused. Most confusable