NAS
"nas" is a 3-letter English headword indexed on PlainSpell.
The verdict
“NAS” sits in 20 confusable pairs (corpus #14,372) as a proper noun. The look-alike neighbours are the real trap.
- #14,372
- frequency rank, English
- 1,534
- “N” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of National Academy of Sciences (US).
Corpus desk
Index EN-nas · NAS · English
NAS · rank #14,372 · 0 variants · 20 confusables
- FREQ-MID #14,372
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 1,534
- PHOTO-FINISH numb
Nearest frequency peer: numb (+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.
Frequency neighbours of confusable “NAS”
Peers at similar corpus weight, separate from look-alike pairs below
- medicinal
medicinal
85,633 corpus weight
- Melanie
Melanie
85,632 corpus weight
- NAS
NAS
85,629 corpus weight
- numb
numb
85,628 corpus weight
- omitted
omitted
85,627 corpus weight
- overlook
overlook
85,625 corpus weight
What this shows Bars place “NAS” against nearest ranked English headwords, not a reprint of the confusable-pair desk.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | NAS |
| Language | English |
| Part of speech | Proper noun |
| Letters | 3 |
| Frequency rank | #14,372 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “NAS”
Easy to mix with look-alikes
The spelling risk for NAS is neighbouring look-alikes ("NC", "ne", …), not just typos; it is aproper noun. Frequency #14,372 among 1,534 “N” headwords. 4 recorded senses keep meaning in play.
No misspelling variants are generated for NAS in our index, since its letter sequence doesn't invite the usual edit-distance slips. It also participates in 20 confusable-pair relationships, "NC", "ne", "NJ", and more, where similar look or sound leads writers to substitute one word for another in context.
No borrowing history is documented 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 NAS, spelled N-A-S.
Definition
- 1Initialism of National Academy of Sciences (US).
- 2Initialism of National Association of Scholars (US).
- 3Initialism of National Autistic Society (UK).
- 4Initialism of New American Standard (Bible).
Recorded use
Wiktionary exampleThese source excerpts show how NAS appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
“Decades of climate research and data have yielded expanded understanding of how greenhouse gases affect the climate,” NAS president Marcia McNutt said in a statement.
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 "NAS", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).