advocacy vs urging

advocacy and urging both are nouns.

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

As nouns, urging is a hyponym of advocacy; that is, urging 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
urging: the act of earnestly supporting or encouraging

Other hyponyms of advocacy include drumbeat, insistence, insistency.

advocacy (noun)	urging (noun)
active support of an idea or cause etc.; especially the act of pleading or arguing for something	the act of earnestly supporting or encouraging
	a verbalization that encourages you to attempt something
	insistent solicitation and entreaty