communication vs human activity

communication and human activity both are nouns.

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

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

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

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

communication (noun)	human activity (noun)
something that is communicated by or to or between people or groups	something that people do or cause to happen
the activity of communicating; the activity of conveying information
a connection allowing access between persons or places