vaporous in WordNet English dictionary

1. so thin as to transmit light
   "a hat with a diaphanous veil"; "filmy wings of a moth"; "gauzy clouds of dandelion down"; "gossamer cobwebs"; "sheer silk stockings"; "transparent chiffon"; "vaporous silks"
   diaphanous  filmy  gauzy  gauze-like  gossamer  see-through  sheer  transparent  vaporous  vapourous  cobwebby 
   
2. filled with vapor
   "miasmic jungles"; "a vaporous bog"
   miasmal  miasmic  vaporous  vapourous 
   
3. resembling or characteristic of vapor
   "vaporous clouds"
   vaporific  vapourific  vaporish  vapourish  vaporous  vapourous