advocacy vs drumbeat

advocacy and drumbeat both are nouns.

Word	Noun	Adjective	Verb	Adverb
advocacy	Yes	No	No	No
drumbeat	Yes	No	No	No

As nouns, drumbeat is a hyponym of advocacy; that is, drumbeat is a word with a more specific, narrower meaning than advocacy:

advocacy: active support of an idea or cause etc.; especially the act of pleading or arguing for something
drumbeat: a vehement and vociferous advocacy of a cause

Other hyponyms of advocacy include insistence, insistency, urging.

advocacy (noun)	drumbeat (noun)
active support of an idea or cause etc.; especially the act of pleading or arguing for something	a vehement and vociferous advocacy of a cause
	(military) the beating of a drum as a signal for lowering the flag at sundown
	the sound made by beating a drum