expostulation vs communicating

expostulation and communicating both are nouns.

Word	Noun	Adjective	Verb	Adverb
expostulation	Yes	No	No	No
communicating	Yes	No	No	No

As nouns, communicating is a hypernym of expostulation; that is, communicating is a word with a broader meaning than expostulation:

expostulation: the act of expressing earnest opposition or protest
communicating: the activity of communicating; the activity of conveying information

Other hypernyms of expostulation include communication.

expostulation (noun)	communicating (noun)
the act of expressing earnest opposition or protest	the activity of communicating; the activity of conveying information
an exclamation of protest or remonstrance or reproof