Which to use
“dob” and “dup” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #44,170
- “dob” frequency rank
- #28,177
- “dup” frequency rank
- 72347
- confusion score
Side-by-Side Comparison
| Feature | dob | dup |
|---|---|---|
| Definition | To report a person to someone in authority for a wrongdoing. (For transitive forms see dob in, dob on.) | to open (a door, gate etc.) |
Where the eye mixes dob and dup
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. dob and dup follow the identical consonant-vowel pattern (CVC). Same shape at a glance is often the real trap, independent of shared letters.
Why the eye confuses dob with dup
A purely visual mix-up. dob (/dɑb/) and dup (/dʌp/) 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 72347, derived from the frequency rank of both members and their visual similarity.
dob is recorded at frequency rank #44,170, classified as averb, pronounced /dɑb/. dup is at rank #28,177, tagged as averb, pronounced /dʌp/.
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 72347, this pair ranks #43,350 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of dob vs dup
Shared letters: d. Private to "dob": bo. Private to "dup": pu.
"dob" · 3 letters · shape CVC · "dup" · 3 letters · shape CVC
Frequently Asked Questions
Can "dob" and "dup" be used interchangeably?
In ordinary English text, does "dob" or "dup" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "dob" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "dup" - compare definitions side by side with the headword page. Word entry
- This pair ranks #43,350 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "dob" and "dup" also get mixed up with nearby pairs, the highest-scored neighbour is "dob vs dox". Nearby pair
Confusion rank #43,350 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.