safevssureWhat's the difference?

Which to use

“safe” and “sure” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#914
“safe” frequency rank
#202
“sure” frequency rank
1116
confusion score

Side-by-Side Comparison

Feature safe sure
Definition Not in danger; out of harm's reach. Physically secure and certain, non-failing, reliable.

Where the eye mixes safe and sure

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
safe
4 ch
sure

Spelling & Dictionary Insight

A purely visual mix-up. safe (/seɪf/) and sure (/ʃɔː(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 1116, derived from the frequency rank of both members and their visual similarity.

safe is recorded at frequency rank #914, classified as anadj, pronounced /seɪf/. sure is at rank #202, tagged as anadj, pronounced /ʃɔː(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 1116, this pair ranks #528,061 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of safe vs sure

Shared letters: es. Private to "safe": af. Private to "sure": ru.

"safe" · 4 letters · shape CVCV  ·  "sure" · 4 letters · shape CVCV

Known mistypes of this pair

  • safeasfe · saef · saffe · sfae · ssafe
  • suresrue · ssure · suer · surre · usre

Frequently Asked Questions

Can "safe" and "sure" be used interchangeably?
No. They are said differently (/seɪf/ versus /ʃɔː(ɹ)/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "safe" or "sure"?
"sure" is the more common of the two: it sits at frequency rank #202 in our English list, against #914 for "safe". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list