Which to use
“clack” and “class” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #46,381
- “clack” frequency rank
- #430
- “class” frequency rank
- 46811
- confusion score
Side-by-Side Comparison
| Feature | clack | class |
|---|---|---|
| Definition | An abrupt, sharp sound, especially one made by two hard objects colliding repetitively; a sound midway between a click and a clunk. | A group, collection, category or set sharing characteristics or attributes. |
Where the eye mixes clack and class
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses clack with class
A purely visual mix-up. clack (/klæk/) and class (/klɑːs/) 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 46811, 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/. class is at rank #430, tagged as anoun, pronounced /klɑːs/.
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 46811, this pair ranks #208,248 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of clack vs class
Shared letters: acl. Private to "clack": k. Private to "class": s.
"clack" · 5 letters · shape CCVCC · "class" · 5 letters · shape CCVCC
Known mistypes of this pair
Frequently Asked Questions
Do "clack" and "class" mean the same thing in a sentence?
In ordinary English text, does "clack" or "class" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "clack" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "class" - compare definitions side by side with the headword page. Word entry
- This pair ranks #208,248 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "clack" and "class" 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 #208,248 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.