T1 vs TH, What's the Difference?

Which to use

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

#22,113
“T1” frequency rank: #16,022
“TH” frequency rank: 38135
confusion score

Side-by-Side Comparison

Feature	T1	TH
Definition	Premier trimestre : janvier, février et mars.	titre hydrotimétrique (GH en allemand pour GesamtHärte).

Where the eye mixes T1 and TH

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

2 ch

Look-alike desk: T1 vs TH

A purely visual mix-up. T1 (\te.œ̃\) and TH (\te.aʃ\) 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 a single letter - 1 in “T1” becomes h in “TH”. Our composite confusion score for this pair is 38135, 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\. TH is at rank #16,022, tagged as anoun, pronounced \te.aʃ\.

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 38135, this pair ranks #257,407 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of T1 vs TH

Shared letters: t. Private to "T1": -. Private to "TH": h.

"T1" · 1 letters · shape C · "TH" · 2 letters · shape CC

Frequently Asked Questions

Do "T1" and "TH" mean the same thing in a sentence?

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

Frequency check: "T1" vs "TH" - which ranks higher?

"TH" is the more common of the two: it sits at frequency rank #16,022 in our French list, against #22,113 for "T1". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

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 "T1" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "TH" - compare definitions side by side with the headword page. Word entry
This pair ranks #257,407 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"T1" and "TH" also get mixed up with nearby pairs, the highest-scored neighbour is "T1 vs tif". Nearby pair

Confusion rank #257,407 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.