Definitions
Century Dictionary and Cyclopedia
- Like a nightmare.
Wiktionary
- adj. Resembling a nightmare.
GNU Webster's 1913
- adj. Terrifying, as if in a nightmare{2}; resembling a nightmare{2}.
WordNet 3.0
- adj. extremely alarming
Etymologies
- nightmare + -ish (Wiktionary)
Examples
“A horned and fanged bilat, its talons and the corners of its mouth dripping gore, a creature to whom the term nightmarish truly applied.”
“The Schott Foundation's new report on young black men in public education comes to what they call a nightmarish conclusion: The American education system is systematically failing black males.”
“NELSON Piquet Jr, the driver at the centre of "Crashgate", has broken his silence over what he described as a nightmarish episode in his”
WN.com - Articles related to MTDC to hold tourism expo along with Singapore's CEMS
“Please aliens come and pick me back home. .living on earth is friggin nightmarish in its surrealism.”
Think Progress » Palin: Palin-Bachmann 2012 ticket ‘sounds kind of cool.’
“I kept nightmarishly detailed diaries all through my teens, those years that you REALLY do not want to remember in nightmarish detail.”
“A prosecutor described in nightmarish detail Thursday the rape, mutilation and killing of a suburban housewife, allegedly at the hands of a worker who was supposed to be power-washing her deck.”
“As Executive Trial Counsel at the major Nuremberg trials I had spread before me in nightmarish detail the whole incredible story of Nazi barbarism and of the fiendish persecution of the Jewish people.”
“For this alone, America and the EU are prepared to look the other way, when confronted with what the US embassy cables described as a nightmarish world of rampant corruption, organised crime, forced labour and torture.”
The Guardian: Uzbekistan: Looking in the other direction | Editorial
“The present situation in Iraq can only be described as nightmarish; and endless cycle of bombings, brutality and butchery all concealed behind a screen of media-generated disinformation.”
“Their internals are nightmarish, which is why Bush's strategy has been to play up the war.”
Lists
These user-created lists contain the word ‘nightmarish’.
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macabre
words associated with the macabre & horror.
( open list, randomness )
more:
http://www.wordnik.co...ghastly, grisly, culeus, silly, gruesome, horrid, morbid, angelic, shocking, hideous, ghoulish, frightful and 136 more...
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stpeter's Words
abase, abasement, abashed, abdicate, aberrant, abeyance, abhor, abhorrent, abide, abject, ablation, abnegation and 3536 more...
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Tuesday words
just the next words that come along
nasality, transignification, lapsarian, disciple, slanguage, atwitter, avast, ahoy, asleep, awake, hymnody, glissade and 573 more...
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deegee's Words
pay-per-view, vitriol, delectable, snarky, unflinching, forsake, pervasive, inconsequential, unnerving, allure, endearing, unalloyed and 414 more...
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War in Iraq
Being a Vietnam veteran, I support the troops but hate the demoniacal dishonesty that put them there.
slaughterous, nightmarish, horrifyingly, viciousness, calamitous, catastrophic, ruinous, malefic, annihilative, hellacious, apocalyptic, hideousness and 13 more...
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Danielles words October
wistfully, egotistical, bustled, bogusly, incredulously, disheveled, woolgathering, peripheral, nightmarish, bedlam
Tweets
Looking for tweets for nightmarish.

dmcleod0914 "Clearly today was going to be nightmarish." -Twilight, Stephanie Meyer, pg. 54 Oct 27, 2010