The Oxford Thesaurus An A-Z Dictionary of Synonyms - vapourn.

1) mist, fog, steam, cloud, smoke, smog, exhalation: There arose from the bog a suffocating, miasmic vapour. 2) the vapours. morbidity, hypochondria, hysteria, nervousness, depression, rheuminess, Archaic distemper, Colloq the pip: Charlotte suffered an attack of the vapours and retired to her room.