nightmarious

== English == === Etymology === From nightmare +‎ -ious. === Pronunciation === (Received Pronunciation) IPA(key): /ˌnaɪtˈmɛəɹi.əs/ (General American) IPA(key): /ˌnaɪtˈmɛɹi.əs/ Rhymes: -ɛəɹi.əs === Adjective === nightmarious (comparative more nightmarious, superlative most nightmarious) (rare) Having the qualities of a nightmare. ==== Synonyms ==== nightmarish