county agent vs adviser

county agent and adviser both are nouns.

Word	Noun	Adjective	Verb	Adverb
county agent	Yes	No	No	No
adviser	Yes	No	No	No

As nouns, adviser is a hypernym of county agent; that is, adviser is a word with a broader meaning than county agent:

county agent: an advisor employed by the government to assist people in rural areas with methods of farming and home economics
adviser: an expert who gives advice

Other hypernyms of county agent include advisor, consultant.

county agent (noun)	adviser (noun)
an advisor employed by the government to assist people in rural areas with methods of farming and home economics	an expert who gives advice