nightmarish
"nightmarish" is a 11-letter English headword indexed on PlainSpell.
The verdict
“nightmarish” has 18 generated spelling variants in the English index at frequency #41,784. The variants make it a useful spelling check.
- #41,784
- frequency rank, English
- 24,391
- “N” headwords
- 18
- tracked misspellings
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Resembling a nightmare.
| Property | Value |
|---|---|
| Headword | nightmarish |
| Language | English |
| Part of speech | Adjective |
| Letters | 11 |
| Frequency rank | #41,784 |
| Misspellings tracked | 18 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “nightmarish” sits in English frequency
A misspelling magnet
The generator records 18 spelling variants around nightmarish, anadjective. Corpus frequency is #41,784 among 24,391 “N” headwords. Dominant gloss: "Resembling a nightmare.".
Our generated misspelling index lists 18 likely wrong-spelling variants for nightmarish, with forms such as "inghtmarish", "ngihtmarish", and "nigghtmarish". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. This entry stands alone in our confusable dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From nightmare + -ish. The correct English form is nightmarish, spelled N-I-G-H-T-M-A-R-I-S-H.
Definition
- 1Resembling a nightmare.
Etymology
From nightmare + -ish.
This word in other languages
Common misspellings
Also misspelled as:
- inghtmarish
- ngihtmarish
- nigghtmarish
- nighhtmarish
- nighmtarish
- nightamrish
- nightmairsh
- nightmarihs
- nightmarishh
- nightmarissh
- nightmarrish
- nightmarsih
- nightmmarish
- nightmraish
- nighttmarish
- nigthmarish
- nihgtmarish
- nnightmarish
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of nightmarish - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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 "nightmarish"?
What does "nightmarish" mean?
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Using “nightmarish”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is N-I-G-H-T-M-A-R-I-S-H - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Same frequency band
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.