Which to use
“sou” and “spud” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #35,525
- “sou” frequency rank
- #42,419
- “spud” frequency rank
- 77944
- confusion score
Side-by-Side Comparison
| Feature | sou | spud |
|---|---|---|
| Definition | An old French copper coin equal to one twentieth of a livre or twelve deniers; one sou is to the livre as one shilling is to the pound. | A potato. |
Where the eye mixes sou and spud
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. sou runs 3 letters (CVV) against spud's 4 (CCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses sou with spud
A purely visual mix-up. sou (/suː/) and spud (/spʌd/) 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 letter(s) in length. Our composite confusion score for this pair is 77944, derived from the frequency rank of both members and their visual similarity.
sou is recorded at frequency rank #35,525, classified as anoun, pronounced /suː/. spud is at rank #42,419, tagged as anoun, pronounced /spʌd/.
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 77944, this pair ranks #25,908 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of sou vs spud
Shared letters: su. Private to "sou": o. Private to "spud": dp.
"sou" · 3 letters · shape CVV · "spud" · 4 letters · shape CCVC
Known mistypes of this pair
- spud ← psud · spdu · sppud · spudd · sspud · supd
Frequently Asked Questions
Can "sou" and "spud" be used interchangeably?
Frequency check: "sou" vs "spud" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sou" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "spud" - compare definitions side by side with the headword page. Word entry
- This pair ranks #25,908 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sou" and "spud" also get mixed up with nearby pairs, the highest-scored neighbour is "spud vs suds". 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 #25,908 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.