thiopental
/ˌθʌɪ.əʊˈpɛn.təl/
"thiopental" is a 10-letter English headword indexed on PlainSpell.
The verdict
“thiopental” is uncommon English (frequency #98,798 among 27,828 “T” headwords), classed as a noun. The kind of spelling people second-guess.
- #98,798
- frequency rank, English
- 27,828
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A barbiturate C₁₁H₁₈N₂O₂S (trademark Pentothal) used in the form of its sodium salt especially as an intravenous anesthetic; and as a supposed truth serum.
| Property | Value |
|---|---|
| Headword | thiopental |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌθʌɪ.əʊˈpɛn.təl/ |
| Letters | 10 |
| Frequency rank | #98,798 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “thiopental” sits in English frequency
Rare enough to double-check
thiopental is uncommon English at frequency #98,798 among 27,828 “T” headwords, classed as anoun, transcribed /ˌθʌɪ.əʊˈpɛn.təl/. Rarity is why readers land here mid-draft. Gloss: "A barbiturate C₁₁H₁₈N₂O₂S (trademark Pentothal) used in the form of its sodium salt especially as an intravenous anesthetic; and as a supposed truth serum.".
Zero misspellings are on record for thiopental in our index, since its letter pattern doesn't lend itself to common typo substitutions. This headword has no recorded confusable partner, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: From thio- + pent(obarbi)tal. The correct English form is thiopental, spelled T-H-I-O-P-E-N-T-A-L.
Definition
- 1A barbiturate C₁₁H₁₈N₂O₂S (trademark Pentothal) used in the form of its sodium salt especially as an intravenous anesthetic; and as a supposed truth serum.
Etymology
From thio- + pent(obarbi)tal.
Synonyms
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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Using “thiopental”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-H-I-O-P-E-N-T-A-L - every other letter order is a misspelling in standard orthography.
- Say it as /ˌθʌɪ.əʊˈpɛn.təl/ (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
Other uncommon English words near this rank
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.