hyperthyroidism
/ˌhaɪ̯pəˈθaɪ̯ɹɔɪ̯ˌdɪzəm/
"hyperthyroidism" is a 15-letter English headword indexed on PlainSpell.
The verdict
“hyperthyroidism” is uncommon English (frequency #63,694 among 23,837 “H” headwords), classed as a noun. The kind of spelling people second-guess.
- #63,694
- frequency rank, English
- 23,837
- “H” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The excessive production of hormones by the thyroid.
Corpus desk
Index EN-hyperthyroidism · hyperthyroidism · English
hyperthyroidism · rank #63,694 · 0 variants · 0 confusables
- FREQ-RARE #63,694
- LEN-MEGA 15 letters
- VOW-6 6 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 23,837
- PHOTO-FINISH hyperthermia
Nearest frequency peer: hyperthermia (-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.
Frequency neighbourhood for “hyperthyroidism”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- hydrogenati…
hydrogenation
36,310 corpus weight
- hyperthermia
hyperthermia
36,308 corpus weight
- hyperthyroi…
hyperthyroidism
36,307 corpus weight
- IDM
IDM
36,305 corpus weight
- ignominious
ignominious
36,304 corpus weight
- imperil
imperil
36,300 corpus weight
What this shows Bars show where “hyperthyroidism” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | hyperthyroidism |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌhaɪ̯pəˈθaɪ̯ɹɔɪ̯ˌdɪzəm/ |
| Letters | 15 |
| Frequency rank | #63,694 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “hyperthyroidism” sits in English frequency
Rare enough to double-check
hyperthyroidism is uncommon English at frequency #63,694 among 23,837 “H” headwords, classed as anoun, transcribed /ˌhaɪ̯pəˈθaɪ̯ɹɔɪ̯ˌdɪzəm/. Rarity is why readers land here mid-draft. 2 senses are on record.
No generated misspelling entries exist for hyperthyroidism in our index, which points to an orthography that plays by predictable English rules. This headword has no recorded confusable partner, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From hyper- + thyroid + -ism. The correct English form is hyperthyroidism, spelled H-Y-P-E-R-T-H-Y-R-O-I-D-I-S-M.
Definition
- 1The excessive production of hormones by the thyroid.
- 2The pathological condition resulting from these excess hormones.
Etymology
From hyper- + thyroid + -ism.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "hyperthyroidism", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 15 letters (nearest by frequency 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.