safevsspaceWhat's the difference?

Quick tell: safe is a adjective, space is a noun, so they fill different roles in a sentence.

Which to use

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

#914
“safe” frequency rank
#598
“space” frequency rank
1512
confusion score

Side-by-Side Comparison

Feature safe space
Definition Not in danger; out of harm's reach. Unlimited or generalized extent, physical or otherwise.

Where the eye mixes safe and space

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

4 ch
safe
5 ch
space

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: safe is /seɪf/ while space is /speɪs/. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 1512, derived from the frequency rank of both members and their visual similarity.

safe is recorded at frequency rank #914, classified as anadj, pronounced /seɪf/. space is at rank #598, tagged as anoun, pronounced /speɪs/.

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 1512, this pair ranks #527,273 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of safe vs space

Shared letters: aes. Private to "safe": f. Private to "space": cp.

"safe" · 4 letters · shape CVCV  ·  "space" · 5 letters · shape CCVCV

Known mistypes of this pair

  • safeasfe · saef · saffe · sfae · ssafe
  • spacepsace · sapce · spacce · spaec · spcae · sppace · sspace

Frequently Asked Questions

Can "safe" and "space" be used interchangeably?
No - they are not even the same part of speech. "safe" is an adjective and "space" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "safe" or "space"?
"space" is the more common of the two: it sits at frequency rank #598 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