different between gloomy vs vaporous

English

From gloom +? -y.

gloomy (comparative gloomier, superlative gloomiest)

Not very illuminated; dim because of darkness, especially when appearing depressing or frightening.
Synonyms: dusky, dim, clouded; see also Thesaurus:dark
Suffering from gloom; melancholy; dejected.
Synonyms: bleak, dreary, miserable; see also Thesaurus:cheerless

From Middle French vapoureus, from Late Latin vap?r?sus (“full of steam”).

vaporous (comparative more vaporous, superlative most vaporous)

Relating to vapour; misty, foggy, obscure, insubstantial
- 1594, William Shakespeare, The Rape of Lucrece
  O hateful, vaporous, and foggy night!
- 1605, Francis Bacon, The Advancement of Learning
  So whosoever shall entertain high and vaporous imaginations, instead of a laborious and sober inquiry of truth, shall beget hopes and beliefs of strange and impossible shapes.

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