Which to use
“which” is a conjunction and “whiff” is a noun - they look or sound alike but fill different roles in a sentence.
- #59
- “which” frequency rank
- #21,978
- “whiff” frequency rank
- 22037
- confusion score
Side-by-Side Comparison
| Feature | which | whiff |
|---|---|---|
| Definition | And. | A brief, gentle breeze; a light gust of air; a waft. |
Where the eye mixes which and whiff
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: which vs whiff
These two trip readers on the page rather than in the ear: which is /wɪt͡ʃ/ while whiff is /(h)wɪf/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (conjunction vs noun), which is usually the fastest check. Our composite confusion score for this pair is 22037, derived from the frequency rank of both members and their visual similarity.
which is recorded at frequency rank #59, classified as aconj, pronounced /wɪt͡ʃ/. whiff is at rank #21,978, tagged as anoun, pronounced /(h)wɪf/.
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 22037, this pair ranks #419,521 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of which vs whiff
Shared letters: hiw. Private to "which": c. Private to "whiff": f.
"which" · 5 letters · shape CCVCC · "whiff" · 5 letters · shape CCVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "which" for "whiff" ever safe?
Frequency check: "which" vs "whiff" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "which" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "whiff" - compare definitions side by side with the headword page. Word entry
- This pair ranks #419,521 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "which" and "whiff" also get mixed up with nearby pairs, the highest-scored neighbour is "waifu vs whiff". 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 #419,521 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.