Which to use
“sac” is a noun and “sai” is a verb - they look or sound alike but fill different roles in a sentence.
- #42,101
- “sac” frequency rank
- #47,708
- “sai” frequency rank
- 89809
- confusion score
Side-by-Side Comparison
| Feature | sac | sai |
|---|---|---|
| Definition | ein Transport- und Aufbewahrungsbehältnis aus grobem Stoff oder robustem Material | 2. Person Singular Indikativ Präsens Aktiv des Verbs sapere |
Where the eye mixes sac and sai
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. sac (CVC) and sai (CVV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: sac vs sai
These two trip readers on the page rather than in the ear: sac is [sak] while sai is [ˈsai̯]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - c in “sac” becomes i in “sai”, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 89809, derived from the frequency rank of both members and their visual similarity.
sac is recorded at frequency rank #42,101, classified as anoun, pronounced [sak]. sai is at rank #47,708, tagged as averb, pronounced [ˈsai̯].
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 89809, this pair ranks #53,408 of 2,006,359 scored German confusable pairs - among the most confusable pairs.
Orthographic DNA of sac vs sai
Shared letters: as. Private to "sac": c. Private to "sai": i.
"sac" · 3 letters · shape CVC · "sai" · 3 letters · shape CVV
Frequently Asked Questions
Is swapping "sac" for "sai" ever safe?
Which is more common, "sac" or "sai"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sac" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sai" - compare definitions side by side with the headword page. Word entry
- This pair ranks #53,408 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "sac" and "sai" also get mixed up with nearby pairs, the highest-scored neighbour is "sai vs seg". Nearby pair
Confusion rank #53,408 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.