Which to use
“clack” and “clam” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #46,381
- “clack” frequency rank
- #21,750
- “clam” frequency rank
- 68131
- confusion score
Side-by-Side Comparison
| Feature | clack | clam |
|---|---|---|
| Definition | An abrupt, sharp sound, especially one made by two hard objects colliding repetitively; a sound midway between a click and a clunk. | A bivalve mollusk of many kinds, especially those that are edible; for example soft-shell clams (Mya arenaria), hard clams (Mercenaria mercenaria), sea clams or hen clams (Spisula solidissima), and other species, possibly originally applied to clams of species Tridacna gigas, a huge East Indian bivalve. |
Where the eye mixes clack and clam
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between clack and clam
A purely visual mix-up. clack (/klæk/) and clam (/klæm/) 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 68131, derived from the frequency rank of both members and their visual similarity.
clack is recorded at frequency rank #46,381, classified as anoun, pronounced /klæk/. clam is at rank #21,750, tagged as anoun, pronounced /klæm/.
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 68131, this pair ranks #60,292 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of clack vs clam
Shared letters: acl. Private to "clack": k. Private to "clam": m.
"clack" · 5 letters · shape CCVCC · "clam" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "clack" for "clam" ever safe?
Which is more common, "clack" or "clam"?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "clack" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "clam" - compare definitions side by side with the headword page. Word entry
- This pair ranks #60,292 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "clack" and "clam" also get mixed up with nearby pairs, the highest-scored neighbour is "clack vs clink". 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 #60,292 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.