T1 vs thu, What's the Difference?

Which to use

“T1” and “thu” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#22,113
“T1” frequency rank: #48,228
“thu” frequency rank: 70341
confusion score

Side-by-Side Comparison

Feature	T1	thu
Definition	Premier trimestre : janvier, février et mars.	Forme mutée de tu par spirantisation.

Where the eye mixes T1 and thu

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch

3 ch

thu

Why the eye confuses T1 with thu

A purely visual mix-up. T1 (\te.œ̃\) and thu (\θɨː\) 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 70341, derived from the frequency rank of both members and their visual similarity.

T1 is recorded at frequency rank #22,113, classified as anoun, pronounced \te.œ̃\. thu is at rank #48,228, tagged as anoun, pronounced \θɨː\.

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 70341, this pair ranks #51,671 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of T1 vs thu

Shared letters: t. Private to "T1": -. Private to "thu": hu.

"T1" · 1 letters · shape C · "thu" · 3 letters · shape CCV

Frequently Asked Questions

Is swapping "T1" for "thu" ever safe?

No. They are said differently (\te.œ̃\ versus \θɨː\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Which is more common, "T1" or "thu"?

"T1" is the more common of the two: it sits at frequency rank #22,113 in our French list, against #48,228 for "thu". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "T1" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "thu" - compare definitions side by side with the headword page. Word entry
This pair ranks #51,671 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"T1" and "thu" also get mixed up with nearby pairs, the highest-scored neighbour is "thu vs tif". Nearby pair

Confusion rank #51,671 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.