thermesvsthermosTell them apart

Which to use

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

#24,053
“thermes” frequency rank
#49,973
“thermos” frequency rank
74026
confusion score

Side-by-Side Comparison

Feature thermes thermos
Definition Établissement de bains publics chauds, qui comprenait souvent des palestres, des gymnases, des bibliothèques, des jardins, etc. Récipient isolant conservant la température d’un liquide pendant quelques heures.

Where the eye mixes thermes and thermos

Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. thermes and thermos follow the identical consonant-vowel pattern (CCVCCVC). Same shape at a glance is often the real trap, independent of shared letters.

7 ch
thermes
7 ch
thermos

Why the eye confuses thermes with thermos

A purely visual mix-up. thermes (\tɛʁm\) and thermos (\tɛʁ.mɔs\) 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 - e in “thermes” becomes o in “thermos”. Our composite confusion score for this pair is 74026, derived from the frequency rank of both members and their visual similarity.

thermes is recorded at frequency rank #24,053, classified as anoun, pronounced \tɛʁm\. thermos is at rank #49,973, tagged as anoun, pronounced \tɛʁ.mɔs\.

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 74026, this pair ranks #38,507 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of thermes vs thermos

Shared letters: ehmrst. Private to "thermes": -. Private to "thermos": o.

"thermes" · 7 letters · shape CCVCCVC  ·  "thermos" · 7 letters · shape CCVCCVC

Known mistypes of this pair

  • thermes ← htermes · tehrmes · themres · therems · thermess · thermmes · thermse · therrmes
  • thermos ← htermos · tehrmos · themros · thermmos · thermoss · thermso · theroms · therrmos

Frequently Asked Questions

Can "thermes" and "thermos" be used interchangeably?
No. They are said differently (\tɛʁm\ versus \tɛʁ.mɔs\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "thermes" or "thermos"?
"thermes" is the more common of the two: it sits at frequency rank #24,053 in our French list, against #49,973 for "thermos". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "thermes" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "thermos" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #38,507 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "thermes" and "thermos" also get mixed up with nearby pairs, the highest-scored neighbour is "terms vs thermos". 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 #38,507 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