Which to use
“custom” and “customs” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #3,421
- “custom” frequency rank
- #5,208
- “customs” frequency rank
- 8629
- confusion score
Side-by-Side Comparison
| Feature | custom | customs |
|---|---|---|
| Definition | Frequent repetition of the same behavior; way of behavior common to many; ordinary manner; habitual practice; method of doing, living or behaving. | The duties or taxes imposed on imported or exported goods. |
Where the eye mixes custom and customs
Muted = shared; highlighted = the visual trap. They share 6 letters in sequence.
Look-alike desk: custom vs customs
A purely visual mix-up. custom (/ˈkʌstəm/) and customs (/ˈkʌs.təmz/) 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) - “custom” sits inside “customs”. Our composite confusion score for this pair is 8629, derived from the frequency rank of both members and their visual similarity.
custom is recorded at frequency rank #3,421, classified as anoun, pronounced /ˈkʌstəm/. customs is at rank #5,208, tagged as anoun, pronounced /ˈkʌs.təmz/.
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 8629, this pair ranks #501,539 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of custom vs customs
Shared letters: cmostu. Private to "custom": -. Private to "customs": -.
"custom" · 6 letters · shape CVCCVC · "customs" · 7 letters · shape CVCCVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "custom" for "customs" ever safe?
Which is more common, "custom" or "customs"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "custom" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "customs" - compare definitions side by side with the headword page. Word entry
- This pair ranks #501,539 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "custom" and "customs" also get mixed up with nearby pairs, the highest-scored neighbour is "castor vs custom". 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 #501,539 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.