screamer vs communicator

screamer and communicator both are nouns.

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

As nouns, communicator is a hypernym of screamer; that is, communicator is a word with a broader meaning than screamer:

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