Which to use
“tau” and “thou” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #36,612
- “tau” frequency rank
- #44,777
- “thou” frequency rank
- 81389
- confusion score
Side-by-Side Comparison
| Feature | tau | thou |
|---|---|---|
| Definition | τ, Τ, dix-neuvième lettre et quatorzième consonne de l’alphabet grec. | Écluse en pierre ou en béton permettant de vider lentement les étangs de la Dombes dans l'Ain. |
Where the eye mixes tau and thou
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. tau runs 3 letters (CVV) against thou's 4 (CCVV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses tau with thou
A purely visual mix-up. tau (\to\) and thou (\tu\) 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 81389, derived from the frequency rank of both members and their visual similarity.
tau is recorded at frequency rank #36,612, classified as anoun, pronounced \to\. thou is at rank #44,777, tagged as anoun, pronounced \tu\.
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 81389, this pair ranks #18,873 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of tau vs thou
Shared letters: tu. Private to "tau": a. Private to "thou": ho.
"tau" · 3 letters · shape CVV · "thou" · 4 letters · shape CCVV
Known mistypes of this pair
- thou ← htou · thhou · thuo · tohu · tthou
Frequently Asked Questions
Do "tau" and "thou" mean the same thing in a sentence?
Which is more common, "tau" or "thou"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "tau" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "thou" - compare definitions side by side with the headword page. Word entry
- This pair ranks #18,873 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "tau" and "thou" also get mixed up with nearby pairs, the highest-scored neighbour is "thou vs tos". 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 #18,873 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.