theanine
"theanine" is a 8-letter English headword indexed on PlainSpell.
The verdict
“theanine” is uncommon English (frequency #98,794 among 27,828 “T” headwords), classed as a noun. The kind of spelling people second-guess.
- #98,794
- frequency rank, English
- 27,828
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - amino acid commonly found in tea
| Property | Value |
|---|---|
| Headword | theanine |
| Language | English |
| Part of speech | Noun |
| Letters | 8 |
| Frequency rank | #98,794 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “theanine” sits in English frequency
Rare enough to double-check
theanine is uncommon English at frequency #98,794 among 27,828 “T” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "amino acid commonly found in tea".
We couldn't generate a plausible misspelling set for theanine, which points to an orthography that plays by predictable English rules. We don't track a confusable pairing for this entry, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: Thea (“genus of tea”) + -anine The correct English form is theanine, spelled T-H-E-A-N-I-N-E.
Definition
- 1amino acid commonly found in tea
Etymology
Thea (“genus of tea”) + -anine
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 “theanine”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-H-E-A-N-I-N-E - 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.