NMDA
"nmda" is a 4-letter English headword indexed on PlainSpell.
The verdict
“NMDA” is uncommon English (frequency #58,887 among 1,534 “N” headwords), classed as a noun. The kind of spelling people second-guess.
- #58,887
- frequency rank, English
- 1,534
- “N” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Abbreviation of N-Methyl-D-aspartic acid, an amino acid derivative.
Corpus desk
Index EN-nmda · NMDA · English
NMDA · rank #58,887 · 0 variants · 0 confusables
- FREQ-RARE #58,887
- LEN-MID 4 letters
- VOW-1 1 vowel
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 1,534
- PHOTO-FINISH nisi
Nearest frequency peer: nisi (-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.
Long-tail ranks near “NMDA”
Sparse band: bars invert rank so rarer forms read shorter
- Nimitz
Nimitz
41,118 corpus weight
- Nisbet
Nisbet
41,116 corpus weight
- nisi
nisi
41,115 corpus weight
- NMDA
NMDA
41,114 corpus weight
- Nosferatu
Nosferatu
41,113 corpus weight
- notching
notching
41,112 corpus weight
What this shows Long-tail view: where “NMDA” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | NMDA |
| Language | English |
| Part of speech | Noun |
| Letters | 4 |
| Frequency rank | #58,887 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “NMDA” in English
Rare enough to double-check
NMDA is uncommon English at frequency #58,887 among 1,534 “N” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Abbreviation of N-Methyl-D-aspartic acid, an amino acid derivative.".
We couldn't generate a plausible misspelling set for NMDA, a straightforward case of a spelling with little room for common typos. Our dataset records no confusable match here, since nothing in our dataset looks or sounds close enough to cause mix-ups.
No documented word history exists for this headword, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is NMDA, spelled N-M-D-A.
Definition
- 1Abbreviation of N-Methyl-D-aspartic acid, an amino acid derivative.
Recorded use
Wiktionary exampleThese source excerpts show how NMDA appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
At a synaptic level, the axon terminal having to repeatedly release glutamate is the lecturer droning on repetitively; the moment when the postsynaptic threshold is passed and the NMDA receptors first activate is the dendritic spine finally getting it.
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "NMDA", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 4 letters (nearest by frequency rank).