thermonucléaire

\tɛʁ.mo.ny.kle.ɛʁ\

/\tɛʁ.mo.ny.kle.ɛʁ\/ adj

The verdict

“thermonucléaire” is uncommon French (frequency #69,479 among 3,703 “T” headwords), classed as an adjective. The kind of spelling people second-guess.

#69,479
frequency rank, French
3,703
“T” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Relatif à la fusion de noyaux atomiques à des températures élevées.

Corpus desk

Index FR-thermonucleaire · thermonucléaire · French

thermonucléaire · rank #69,479 · 0 variants · 0 confusables

  • FREQ-RARE #69,479
  • LEN-MEGA 15 letters
  • VOW-7 7 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,703
  • PHOTO-FINISH THD

Nearest frequency peer: THD (-1 rank slots)

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rangs de longue queue près de « thermonucléaire »

Bande clairsemée: les barres inversent le rang pour que le rare se lise plus court

corpus weight

What this shows Vue de longue queue: où « thermonucléaire » se situe face à des rangs français aussi rares.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for thermonucléaire
PropertyValue
Headwordthermonucléaire
LanguageFrench
Part of speechAdjective
IPA\tɛʁ.mo.ny.kle.ɛʁ\
Letters15
Frequency rank#69,479
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Longue queue: rang de « thermonucléaire » en français

Cette échelle va du noyau du français courant (gauche) jusqu'à la traîne des formes rares (droite).thermonucléairetombe dans cette queue de rareté:

#1#100#1K#10K#100K
← used constantlyrarely used →

L'axe est logarithmique: chaque tic marque environ dix fois moins de fréquence. Voisins rares de la même bande: « THD » (#69,478), « textuels » (#69,476), « thy » (#69,482). Parmi 3,703 lemmes en « T », « thermonucléaire » est au #69,479. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

thermonucléaire is uncommon French at frequency #69,479 among 3,703 “T” headwords, classed as anadjective, transcribed \tɛʁ.mo.ny.kle.ɛʁ\. Rarity is why readers land here mid-draft. 2 senses are on record.

The misspelling generator found no plausible variants for thermonucléaire, since its letter pattern doesn't lend itself to common typo substitutions. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

No documented word history exists for this headword, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct French form is thermonucléaire, spelled T-H-E-R-M-O-N-U-C-L-É-A-I-R-E.

Definition

  1. 1
    Relatif à la fusion de noyaux atomiques à des températures élevées.
  2. 2
    Relatif à l’utilisation des armes atomiques basées sur la fusion nucléaire, en particulier par opposition à celles fondées sur la fission.

Recorded use

Wiktionary examples

These source excerpts show how thermonucléaire appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. La fusion thermonucléaire ou fusion nucléaire est un processus où deux noyaux atomiques s’assemblent pour former un noyau plus lourd, processus à l’œuvre de manière naturelle dans le soleil et la plupart des étoiles de l’univers ^([1]).
  2. Dans les conditions actuelles, seule la fission des noyaux lourds est mise à contribution, puisque la fusion thermonucléaire de noyaux légers n’est pas encore maîtrisée.

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "thermonucléaire"?
"thermonucléaire" is spelled T-H-E-R-M-O-N-U-C-L-É-A-I-R-E. The IPA pronunciation is \tɛʁ.mo.ny.kle.ɛʁ\.
What does "thermonucléaire" mean?
As an adjective, "thermonucléaire" means: Relatif à la fusion de noyaux atomiques à des températures élevées.
How do you pronounce "thermonucléaire"?
The IPA (International Phonetic Alphabet) transcription for "thermonucléaire" is \tɛʁ.mo.ny.kle.ɛʁ\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "thermonucléaire" come from?
"thermonucléaire" is a French word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar French words by spelling shape

Same letter count and similar misspelling depth for "thermonucléaire", not the corpus desk frequency band.

Same letter count

Frequency-ranked French headwords with 15 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list