hydrazine
/ˈhaɪdɹəˌziːn/
"hydrazine" is a 9-letter English headword indexed on PlainSpell.
The verdict
“hydrazine” is uncommon English (frequency #70,760 among 2,646 “H” headwords), classed as a noun. The kind of spelling people second-guess.
- #70,760
- frequency rank, English
- 2,646
- “H” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A corrosive, fuming liquid, NH₂-NH₂, used as a rocket fuel.
Corpus desk
Index EN-hydrazine · hydrazine · English
hydrazine · rank #70,760 · 0 variants · 0 confusables
- FREQ-RARE #70,760
- LEN-LONG 9 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,646
- PHOTO-FINISH hyaline
Nearest frequency peer: hyaline (-1 rank slots)
Read with this headword: Spelling guide for this pattern
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.
Long-tail ranks near “hydrazine”
Sparse band: bars invert rank so rarer forms read shorter
- Hurtado
Hurtado
29,244 corpus weight
- husker
husker
29,243 corpus weight
- hyaline
hyaline
29,242 corpus weight
- hydrazine
hydrazine
29,241 corpus weight
- hyoid
hyoid
29,240 corpus weight
- hyperdrive
hyperdrive
29,239 corpus weight
What this shows Long-tail view: where “hydrazine” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | hydrazine |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈhaɪdɹəˌziːn/ |
| Letters | 9 |
| Frequency rank | #70,760 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “hydrazine” in English
Rare enough to double-check
hydrazine is uncommon English at frequency #70,760 among 2,646 “H” headwords, classed as anoun, transcribed /ˈhaɪdɹəˌziːn/. Rarity is why readers land here mid-draft. 2 senses are on record.
We couldn't generate a plausible misspelling set for hydrazine, since its letter pattern doesn't lend itself to common typo substitutions. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: Borrowed from German Hydrazin, coined by Emile Fischer in 1875 as a derivative from Diazin, an obsolete name for diimide, of which hydrazine is a hydrogenated analog. By surface analysis, hydr- + azo (“nitrogen”) + -ine. The correct English form is hydrazine, spelled H-Y-D-R-A-Z-I-N-E.
Definition
- 1A corrosive, fuming liquid, NH₂-NH₂, used as a rocket fuel.
- 2Any member of the class of organic compounds formally derived from NH₂-NH₂.
Recorded use
Wiktionary exampleThese source excerpts show how hydrazine appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
From ethyleneoxides or ethyleneimines carrying an acyl substituent, with hydrazine and its derivatives (Ch. 3. XV).
Etymology
Borrowed from German Hydrazin, coined by Emile Fischer in 1875 as a derivative from Diazin, an obsolete name for diimide, of which hydrazine is a hydrogenated analog. By surface analysis, hydr- + azo (“nitrogen”) + -ine.
Synonyms
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 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "hydrazine", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).