gloomy Gus vs sourpuss

gloomy Gus and sourpuss both are nouns.

Word	Noun	Adjective	Verb	Adverb
gloomy Gus	Yes	No	No	No
sourpuss	Yes	No	No	No

As nouns, gloomy Gus and sourpuss are synonyms defined as:

gloomy Gus and sourpuss: someone with a habitually sullen or gloomy expression

Other synonyms of gloomy Gus include picklepuss, pouter.

gloomy Gus (noun)	sourpuss (noun)
someone with a habitually sullen or gloomy expression	someone with a habitually sullen or gloomy expression