Which to use
“when” and “whence” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #48
- “when” frequency rank
- #25,641
- “whence” frequency rank
- 25689
- confusion score
Side-by-Side Comparison
| Feature | when | whence |
|---|---|---|
| Definition | At what time? At which time? Upon which occasion or circumstance? Used to introduce direct or indirect questions about time. | From where; from which place or source. |
Where the eye mixes when and whence
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between when and whence
A purely visual mix-up. when (/ˈwɛn/) and whence (/ʍɛns/) 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 2 extra letter(s) - “when” sits inside “whence”. Our composite confusion score for this pair is 25689, derived from the frequency rank of both members and their visual similarity.
when is recorded at frequency rank #48, classified as anadv, pronounced /ˈwɛn/. whence is at rank #25,641, tagged as anadv, pronounced /ʍɛns/.
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 25689, this pair ranks #392,386 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of when vs whence
Shared letters: ehnw. Private to "when": -. Private to "whence": c.
"when" · 4 letters · shape CCVC · "whence" · 6 letters · shape CCVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "when" for "whence" ever safe?
In ordinary English text, does "when" or "whence" 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 "when" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "whence" - compare definitions side by side with the headword page. Word entry
- This pair ranks #392,386 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "when" and "whence" also get mixed up with nearby pairs, the highest-scored neighbour is "whence vs wince". 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 #392,386 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.