NIAID
"niaid" is a 5-letter English headword indexed on PlainSpell.
The verdict
“NIAID” is uncommon English (frequency #94,049 among 24,391 “N” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #94,049
- frequency rank, English
- 24,391
- “N” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of National Institute of Allergy and Infectious Diseases.
| Property | Value |
|---|---|
| Headword | NIAID |
| Language | English |
| Part of speech | Proper noun |
| Letters | 5 |
| Frequency rank | #94,049 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “NIAID” sits in English frequency
Rare enough to double-check
NIAID is uncommon English at frequency #94,049 among 24,391 “N” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. Gloss: "Initialism of National Institute of Allergy and Infectious Diseases.".
NIAID doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable English rules. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
This entry carries no recorded etymology, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is NIAID, spelled N-I-A-I-D.
Definition
- 1Initialism of National Institute of Allergy and Infectious Diseases.
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 "NIAID"?
What does "NIAID" mean?
What language does "NIAID" come from?
Is PlainSpell free to use?
Using “NIAID”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is N-I-A-I-D - 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.