jackvsjamsWhat's the difference?

Which to use

“jack” and “jams” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#1,604
“jack” frequency rank
#16,260
“jams” frequency rank
17864
confusion score

Side-by-Side Comparison

Feature jack jams
Definition A coarse medieval coat of defence, especially one made of leather. plural of jam

Where the eye mixes jack and jams

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
jack
4 ch
jams

Spelling & Dictionary Insight

A purely visual mix-up. jack (/d͡ʒæk/) and jams (/d͡ʒæmz/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 17864, 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/. jams is at rank #16,260, tagged as anoun, pronounced /d͡ʒæmz/.

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 17864, this pair ranks #448,629 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of jack vs jams

Shared letters: aj. Private to "jack": ck. Private to "jams": ms.

"jack" · 4 letters · shape CVCC  ·  "jams" · 4 letters · shape CVCC

Known mistypes of this pair

  • jackajck · jacck · jackk · jakc · jcak · jjack
  • jamsajms · jamms · jamss · jasm · jjams · jmas

Frequently Asked Questions

Can "jack" and "jams" be used interchangeably?
No. They are said differently (/d͡ʒæk/ versus /d͡ʒæmz/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "jack" or "jams"?
"jack" is the more common of the two: it sits at frequency rank #1,604 in our English list, against #16,260 for "jams". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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

Source: FrequencyWords open word-frequency list