TDA
"tda" is a 3-letter English headword indexed on PlainSpell.
The verdict
“TDA” is uncommon English (frequency #80,037 among 27,828 “T” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #80,037
- frequency rank, English
- 27,828
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of Trade and Development Agency.
| Property | Value |
|---|---|
| Headword | TDA |
| Language | English |
| Part of speech | Proper noun |
| Letters | 3 |
| Frequency rank | #80,037 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “TDA” sits in English frequency
Rare enough to double-check
TDA is uncommon English at frequency #80,037 among 27,828 “T” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. 2 senses are on record.
Our edit-distance generator produced no likely misspellings for TDA, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Our source data has no etymology on file for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct English form is TDA, spelled T-D-A.
Definition
- 1Initialism of Trade and Development Agency.
- 2Initialism of Tren de Aragua.
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 “TDA”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-D-A - 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.