Which to use
“sack” and “sai” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #8,200
- “sack” frequency rank
- #20,482
- “sai” frequency rank
- 28682
- confusion score
Side-by-Side Comparison
| Feature | sack | sai |
|---|---|---|
| Definition | A bag; especially a large bag of strong, coarse material for storage and handling of various commodities, such as potatoes, coal, coffee; or, a bag with handles used at a supermarket, a grocery sack; or, a small bag for small items, a satchel. | A handheld weapon with three prongs, used in some Oriental martial arts. |
Where the eye mixes sack and sai
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: sack vs sai
A purely visual mix-up. sack (/sæk/) and sai (/saɪ/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 28682, derived from the frequency rank of both members and their visual similarity.
sack is recorded at frequency rank #8,200, classified as anoun, pronounced /sæk/. sai is at rank #20,482, tagged as anoun, pronounced /saɪ/.
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 28682, this pair ranks #369,148 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sack vs sai
Shared letters: as. Private to "sack": ck. Private to "sai": i.
"sack" · 4 letters · shape CVCC · "sai" · 3 letters · shape CVV
Known mistypes of this pair
- sack ← asck · sacck · sackk · sakc · scak · ssack
Frequently Asked Questions
Is swapping "sack" for "sai" ever safe?
In ordinary English text, does "sack" or "sai" show up more?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sack" 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 #369,148 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sack" and "sai" also get mixed up with nearby pairs, the highest-scored neighbour is "sai vs Sif". 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 #369,148 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.