nightmarish

adj

By · According to Wiktionary data (CC BY-SA) ·

"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
1,534
“N” headwords
18
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Resembling a nightmare.

Corpus desk

Index EN-nightmarish · nightmarish · English

nightmarish · rank #41,784 · 18 variants · 0 confusables

  • FREQ-MID #41,784
  • LEN-MEGA 11 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 18 variants
  • BOOK-MID 1,534
  • PHOTO-FINISH nitty

Nearest frequency peer: nitty (+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.

Rank peers near misspelling magnet “nightmarish”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “nightmarish” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for nightmarish
PropertyValue
Headwordnightmarish
LanguageEnglish
Part of speechAdjective
Letters11
Frequency rank#41,784
Misspellings tracked18
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “nightmarish”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).nightmarishlands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “nitty” (#41,785), “ney” (#41,782), “neuroscientist” (#41,780). Among 1,534 “N” headwords, “nightmarish” is #41,784. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 18 spelling variants around nightmarish, anadjective. Corpus frequency is #41,784 among 1,534 “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

  1. 1
    Resembling a nightmare.

Recorded use

Wiktionary examples

These source excerpts show how nightmarish appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Meanwhile, the everyday landscape becomes more nightmarish and unmanageable each year.
  2. The dragon from under-earth, the nightmarish destroyer, lay destroyed as well, utterly without life.

Etymology

From nightmare + -ish.

This word in other languages

pesadillesco(Español)cauchemardesque(Français)albtraumhaft(Deutsch)

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.

inghtmarish2ngihtmarish2nigghtmarish1nighhtmarish1nighmtarish2nightamrish2nightmairsh2nightmarihs2
Edit distance from "nightmarish"

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"?
"nightmarish" is spelled N-I-G-H-T-M-A-R-I-S-H.
What does "nightmarish" mean?
As an adjective, "nightmarish" means: Resembling a nightmare.
What are common misspellings of "nightmarish"?
Common misspellings include "inghtmarish", "ngihtmarish", "nigghtmarish", "nighhtmarish", "nighmtarish". The correct spelling is "nightmarish".
What is the origin of the word "nightmarish"?
From nightmare + -ish. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "nightmarish", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

overzealous#41,798prejudicial#41,819Machiavelli#41,747ritualistic#41,852

Similar misspelling depth

Headwords with a similar count of attested misspellings (18 here; floor ≥5).

troublemaker18 variantsunrestrained18 variantsexclusionary18 variantscorroboration18 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list