T5vstosWhich spelling fits?

Which to use

“T5” and “tos” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#45,905
“T5” frequency rank
#48,234
“tos” frequency rank
94139
confusion score

Side-by-Side Comparison

Feature T5 tos
Definition Cinquième vertèbre thoracique (de haut en bas). Élève de première année à l’École polytechnique.

Where the eye mixes T5 and tos

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. T5 runs 1 letters (C) against tos's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.

2 ch
T5
3 ch
tos

Visual trap between T5 and tos

A purely visual mix-up. T5 (\te.sɛ̃k\) and tos (\tos\) 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 94139, derived from the frequency rank of both members and their visual similarity.

T5 is recorded at frequency rank #45,905, classified as anoun, pronounced \te.sɛ̃k\. tos is at rank #48,234, tagged as anoun, pronounced \tos\.

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 94139, this pair ranks #1,819 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of T5 vs tos

Shared letters: t. Private to "T5": -. Private to "tos": os.

"T5" · 1 letters · shape C  ·  "tos" · 3 letters · shape CVC

Frequently Asked Questions

Can "T5" and "tos" be used interchangeably?
No. They are said differently (\te.sɛ̃k\ versus \tos\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "T5" or "tos"?
"T5" is the more common of the two: it sits at frequency rank #45,905 in our French list, against #48,234 for "tos". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Eye-level mix-up between "T5" and "tos" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "T5" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "tos" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,819 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "T5" and "tos" also get mixed up with nearby pairs, the highest-scored neighbour is "tif vs tos". Nearby pair

Confusion rank #1,819 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list