As adjectives the difference between cloudy and nebular
is that cloudy is covered with or characterised by clouds; overcast while nebular is (astronomy) of or pertaining to a nebula.
cloudy
English
Adjective
(er)
Covered with or characterised by clouds; overcast.
Not transparent or clear.
Uncertain; unclear.
nebular
English
Adjective
(-)
(astronomy) Of or pertaining to a nebula
Related terms
* nebulosity
* nebulous
* nebula