communicating vs human activity

communicating and human activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
communicating	Yes	No	No	No
human activity	Yes	No	No	No

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

communicating: the activity of communicating; the activity of conveying information
human activity: something that people do or cause to happen

Other hypernyms of communicating include act, deed, human action.

communicating (noun)	human activity (noun)
the activity of communicating; the activity of conveying information	something that people do or cause to happen