Which to use
“coast” and “cobalt” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,420
- “coast” frequency rank
- #17,796
- “cobalt” frequency rank
- 19216
- confusion score
Side-by-Side Comparison
| Feature | coast | cobalt |
|---|---|---|
| Definition | The edge of the land where it meets an ocean, sea, gulf, bay, or large lake. | A chemical element (symbol Co) with an atomic number of 27: a hard, lustrous, silver-gray metal. |
Where the eye mixes coast and cobalt
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Why the eye confuses coast with cobalt
A purely visual mix-up. coast (/kəʊst/) and cobalt (/ˈkəʊ.bɒlt/) 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 19216, derived from the frequency rank of both members and their visual similarity.
coast is recorded at frequency rank #1,420, classified as anoun, pronounced /kəʊst/. cobalt is at rank #17,796, tagged as anoun, pronounced /ˈkəʊ.bɒlt/.
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 19216, this pair ranks #439,691 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of coast vs cobalt
Shared letters: acot. Private to "coast": s. Private to "cobalt": bl.
"coast" · 5 letters · shape CVVCC · "cobalt" · 6 letters · shape CVCVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "coast" for "cobalt" ever safe?
Frequency check: "coast" vs "cobalt" - which ranks higher?
After this comparison
Eye-level mix-up between "coast" and "cobalt" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "coast" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cobalt" - compare definitions side by side with the headword page. Word entry
- This pair ranks #439,691 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "coast" and "cobalt" also get mixed up with nearby pairs, the highest-scored neighbour is "cobalt vs cobble". 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 #439,691 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.