sacvsspaceWhich spelling fits?

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

Which to use

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

#1,345
“sac” frequency rank
#8,162
“space” frequency rank
9507
confusion score

Side-by-Side Comparison

Feature sac space
Definition Contenant muni d’une ouverture éventuellement refermable et fait d’un matériau souple (plastique, cuir, étoffe…) qui sert à mettre toutes sortes de choses. Spécial, étrange, qui sort de l’ordinaire.

Where the eye mixes sac and space

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

3 ch
sac
5 ch
space

Why the eye confuses sac with space

These two trip readers on the page rather than in the ear: sac is \sak\ while space is \spɛs\. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 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 9507, derived from the frequency rank of both members and their visual similarity.

sac is recorded at frequency rank #1,345, classified as anoun, pronounced \sak\. space is at rank #8,162, tagged as anadj, pronounced \spɛs\.

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 9507, this pair ranks #416,392 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of sac vs space

Shared letters: acs. Private to "sac": -. Private to "space": ep.

"sac" · 3 letters · shape CVC  ·  "space" · 5 letters · shape CCVCV

Known mistypes of this pair

  • spacepsace · sapce · spacce · spaec · spcae · sppace · sspace

Frequently Asked Questions

Can "sac" and "space" be used interchangeably?
No - they are not even the same part of speech. "sac" is a noun and "space" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "sac" or "space" show up more?
"sac" is the more common of the two: it sits at frequency rank #1,345 in our French list, against #8,162 for "space". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

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 "sac" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "space" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #416,392 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "sac" and "space" also get mixed up with nearby pairs, the highest-scored neighbour is "space vs stase". 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 #416,392 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list