pouter vs sourpuss

pouter and sourpuss both are nouns.

Word	Noun	Adjective	Verb	Adverb
pouter	Yes	No	No	No
sourpuss	Yes	No	No	No

As nouns, pouter and sourpuss are synonyms defined as:

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

Other synonyms of pouter include gloomy Gus, picklepuss.

pouter (noun)	sourpuss (noun)
one of a breed of pigeon that enlarge their crop until their breast is puffed out	someone with a habitually sullen or gloomy expression
someone with a habitually sullen or gloomy expression