Which to use
“passcode” and “postcode” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #41,804
- “passcode” frequency rank
- #29,045
- “postcode” frequency rank
- 70849
- confusion score
Side-by-Side Comparison
| Feature | passcode | postcode |
|---|---|---|
| Definition | A string of characters used for authentication on a digital device. | A sequence of letters and numbers added to a postal address to aid the sorting and delivery of post or mail. |
Letter map: passcode vs postcode
Shared letters muted; letters that set passcode and postcode apart highlighted. Shared run: 6.
Pair insight - passcode / postcode
passcode and postcode are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 70849, derived from the frequency rank of both members and their visual similarity.
passcode is recorded at frequency rank #41,804, classified as anoun. postcode is at rank #29,045, tagged as anoun, pronounced /ˈpəʊs(t)kəʊd/.
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 70849, this pair ranks #48,986 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of passcode vs postcode
Shared letters: cdeops. Private to "passcode": a. Private to "postcode": t.
"passcode" · 8 letters · shape CVCCCVCV · "postcode" · 8 letters · shape CVCCCVCV
Known mistypes of this pair
Frequently Asked Questions
Do "passcode" and "postcode" mean the same thing in a sentence?
Which is more common, "passcode" or "postcode"?
What to do next
Done with this confusable. These links stay specific to "passcode" and "postcode".
- Full dictionary entry for "passcode" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "postcode" - compare definitions side by side with the headword page. Word entry
- This pair ranks #48,986 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "passcode" and "postcode" also get mixed up with nearby pairs, the highest-scored neighbour is "postcode vs postpone". 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 #48,986 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.