hydrogen sulfide
/ˈhaɪdɹədʒ(ə)n ˈsʌlfaɪd/
"hydrogen-sulfide" is a 15-letter English headword indexed on PlainSpell.
The verdict
“hydrogen sulfide” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 16
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A toxic gas, H₂S, smelling like rotten eggs and used in analytical chemistry and industry.
| Property | Value |
|---|---|
| Headword | hydrogen sulfide |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈhaɪdɹədʒ(ə)n ˈsʌlfaɪd/ |
| Letters | 16 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “hydrogen sulfide” sits in English frequency
Rare enough to double-check
hydrogen sulfide is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈhaɪdɹədʒ(ə)n ˈsʌlfaɪd/. Rarity is why readers land here mid-draft. Gloss: "A toxic gas, H₂S, smelling like rotten eggs and used in analytical chemistry and industry.".
Our edit-distance generator produced no likely misspellings for hydrogen sulfide, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Wiktionary doesn't record an etymology for this headword, so its spelling is best read as a straightforward mapping from sound to letter. The correct English form is hydrogen sulfide, spelled H-Y-D-R-O-G-E-N- -S-U-L-F-I-D-E.
Definition
- 1A toxic gas, H₂S, smelling like rotten eggs and used in analytical chemistry and industry.
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). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “hydrogen sulfide”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is H-Y-D-R-O-G-E-N- -S-U-L-F-I-D-E - every other letter order is a misspelling in standard orthography.
- Say it as /ˈhaɪdɹədʒ(ə)n ˈsʌlfaɪd/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English 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.