The Latin word nebula
Word nebula
Meaning cloud
See also Hittite: ne-e-pi-iš ‘sky, heaven’
Synonyms nubes

Other words that might be of interest
sol ‘sun’, luna ‘moon’, stella ‘star’, cālīgō ‘fog’, tenebrae ‘fog’, caelum ‘sky, heaven, vault of heaven’, nix ‘snow’, astrum ‘star, constellation’, caelestis ‘heavenly, celestial’