Which to use
“jack” and “jacks” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,604
- “jack” frequency rank
- #16,950
- “jacks” frequency rank
- 18554
- confusion score
Side-by-Side Comparison
| Feature | jack | jacks |
|---|---|---|
| Definition | A coarse medieval coat of defence, especially one made of leather. | plural of jack |
Where the eye mixes jack and jacks
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between jack and jacks
A purely visual mix-up. jack (/d͡ʒæk/) and jacks (/d͡ʒæks/) 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 extra letter(s) - “jack” sits inside “jacks”. Our composite confusion score for this pair is 18554, derived from the frequency rank of both members and their visual similarity.
jack is recorded at frequency rank #1,604, classified as anoun, pronounced /d͡ʒæk/. jacks is at rank #16,950, tagged as anoun, pronounced /d͡ʒæks/.
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 18554, this pair ranks #444,116 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of jack vs jacks
Shared letters: acjk. Private to "jack": -. Private to "jacks": s.
"jack" · 4 letters · shape CVCC · "jacks" · 5 letters · shape CVCCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "jack" for "jacks" ever safe?
In ordinary English text, does "jack" or "jacks" 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 "jack" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "jacks" - compare definitions side by side with the headword page. Word entry
- This pair ranks #444,116 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "jack" and "jacks" also get mixed up with nearby pairs, the highest-scored neighbour is "jacks vs jocks". 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 #444,116 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.