TSH
"tsh" is a 3-letter English headword indexed on PlainSpell.
The verdict
“TSH” is uncommon English (frequency #55,159 among 27,828 “T” headwords), classed as a noun. The kind of spelling people second-guess.
- #55,159
- frequency rank, English
- 27,828
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of thyroid-stimulating hormone.
| Property | Value |
|---|---|
| Headword | TSH |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #55,159 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “TSH” sits in English frequency
Rare enough to double-check
TSH is uncommon English at frequency #55,159 among 27,828 “T” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Initialism of thyroid-stimulating hormone.".
TSH doesn't appear in our generated misspelling index, since its letter pattern doesn't lend itself to common typo substitutions. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.
No documented word history exists for this headword, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct English form is TSH, spelled T-S-H.
Definition
- 1Initialism of thyroid-stimulating hormone.
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
How do you spell "TSH"?
What does "TSH" mean?
What language does "TSH" come from?
Is PlainSpell free to use?
Using “TSH”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-S-H - every other letter order is a misspelling in standard orthography.
- 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.