thermonuklear

[ˌtɛʁmonukleˈaːɐ̯]

/[ˌtɛʁmonukleˈaːɐ̯]/ adj

By · According to Wiktionary data (CC BY-SA) ·

The verdict

“thermonuklear” is uncommon German (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency German
13
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - die bei einer Kernreaktion auftretende Wärme betreffend

Key facts for thermonuklear
PropertyValue
Headwordthermonuklear
LanguageGerman
Part of speechAdjective
IPA[ˌtɛʁmonukleˈaːɐ̯]
Letters13
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “thermonuklear” sits in German frequency

thermonuklear falls outside the top-100,000 ranked German words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

thermonuklear is uncommon German outside the top frequency list, classed as anadjective, transcribed [ˌtɛʁmonukleˈaːɐ̯]. Rarity is why readers land here mid-draft. Gloss: "die bei einer Kernreaktion auftretende Wärme betreffend".

thermonuklear doesn't appear in our generated misspelling index, since its letter sequence doesn't invite the usual edit-distance slips. No confusable counterpart is on file for this word, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Wiktionary doesn't record an etymology for this headword, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct German form is thermonuklear, spelled T-H-E-R-M-O-N-U-K-L-E-A-R.

Definition

  1. 1
    die bei einer Kernreaktion auftretende Wärme betreffend

This word in other languages

thermonuclear(English)thermonucléaire(Français)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "thermonuklear"?
"thermonuklear" is spelled T-H-E-R-M-O-N-U-K-L-E-A-R. The IPA pronunciation is [ˌtɛʁmonukleˈaːɐ̯].
What does "thermonuklear" mean?
As an adjective, "thermonuklear" means: die bei einer Kernreaktion auftretende Wärme betreffend
How do you pronounce "thermonuklear"?
The IPA (International Phonetic Alphabet) transcription for "thermonuklear" is [ˌtɛʁmonukleˈaːɐ̯]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "thermonuklear" come from?
"thermonuklear" is a German word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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.

Using “thermonuklear”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct German spelling is T-H-E-R-M-O-N-U-K-L-E-A-R - every other letter order is a misspelling in standard orthography.
  • Say it as [ˌtɛʁmonukleˈaːɐ̯] (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more German words and confusable pairs in the same reference. German words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list