N2
"n2" is a 1-letter English headword indexed on PlainSpell.
The verdict
“N2” sits in 20 confusable pairs (corpus #29,752) as a noun. The look-alike neighbours are the real trap.
- #29,752
- frequency rank, English
- 1,534
- “N” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 2, 2026) - The rotational speed of the high-pressure spool of a two-spool gas turbine engine or the intermediate-pressure spool of a three-spool gas turbine engine, expressed as a percentage of a certain refe...
Corpus desk
Index EN-n2 · N2 · English
N2 · rank #29,752 · 0 variants · 20 confusables
- FREQ-MID #29,752
- LEN-SHORT 2 letters
- VOW-0 0 vowels
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 1,534
- PHOTO-FINISH Motown
Nearest frequency peer: Motown (-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 neighbourhood for “N2”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- mockingbird
mockingbird
70,252 corpus weight
- Moriarty
Moriarty
70,251 corpus weight
- Motown
Motown
70,250 corpus weight
- N2
N2
70,249 corpus weight
- Nagasaki
Nagasaki
70,248 corpus weight
- NEA
NEA
70,246 corpus weight
What this shows Bars show where “N2” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
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 | N2 |
| Language | English |
| Part of speech | Noun |
| Letters | 2 |
| Frequency rank | #29,752 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “N2” sits in English frequency
Easy to mix with look-alikes
The spelling risk for N2 is neighbouring look-alikes ("na", "NC", …), not just typos; it is anoun. Frequency #29,752 among 1,534 “N” headwords. 2 recorded senses keep meaning in play.
N2 doesn't appear in our generated misspelling index, and the word's spelling is regular enough that our generator found nothing worth flagging. It also participates in 20 confusable-pair relationships, "na", "NC", "ne", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
No borrowing history is documented for this entry, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is N2, spelled N-2.
Definition
- 1The rotational speed of the high-pressure spool of a two-spool gas turbine engine or the intermediate-pressure spool of a three-spool gas turbine engine, expressed as a percentage of a certain reference rotational speed.
- 2Alternative form of N₂.
Recorded use
Wiktionary examplesThese source excerpts show how N2 appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The inputs into the computerized JT9D condition monitoring program for this engine from September 10 through 16 likewise reflected adverse changes in trends of vital operating parameters which were indicative of the possibility of a serious engine malfunction. These data points showed a progressive increase of EGT and fuel flow while N2 showed a progressi…
A test to evaluate the slight increases (25 to 30 pounds per square inch gauge [psig]) in core-driven hydraulic pump pressure indications showed that hydraulic pump pressure would begin to indicate on the FDR with about 35 rpm of core rotation. Another test showed that N2 signals would begin to indicate on the FDR and in the cockpit with about 70 rpm of c…
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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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.