screamer vs shouter

screamer and shouter both are nouns.

Word	Noun	Adjective	Verb	Adverb
screamer	Yes	No	No	No
shouter	Yes	No	No	No

As nouns, screamer and shouter are synonyms defined as:

screamer and shouter: someone who communicates vocally in a very loud voice

Other synonyms of screamer include bawler, bellower, roarer, screecher, yeller.

screamer (noun)	shouter (noun)
a very hard hit ball	someone who communicates vocally in a very loud voice
gooselike aquatic bird of South America having a harsh trumpeting call
a sensational newspaper headline
someone who communicates vocally in a very loud voice