thickheaded
"thickheaded" is a 11-letter English headword indexed on PlainSpell.
The verdict
“thickheaded” is outside the top-ranked English vocabulary, used as an adjective - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 11
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - stupid, obtuse or dumb.
| Property | Value |
|---|---|
| Headword | thickheaded |
| Language | English |
| Part of speech | Adjective |
| Letters | 11 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “thickheaded” sits in English frequency
Spelling & Dictionary Insight
The English entry for thickheaded is 11 letters long, classified as an adjective. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "stupid, obtuse or dumb.".
No misspelling variants are generated for thickheaded in our index, which points to an orthography that plays by predictable English rules. This entry stands alone in our confusable dataset, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From thick + headed. The correct English form is thickheaded, spelled T-H-I-C-K-H-E-A-D-E-D.
Definition
- 1stupid, obtuse or dumb.
Etymology
From thick + headed.
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 “thickheaded”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-H-I-C-K-H-E-A-D-E-D - every other letter order is a misspelling in standard orthography.
- 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.