extension agent vs consultant

extension agent and consultant both are nouns.

Word	Noun	Adjective	Verb	Adverb
extension agent	Yes	No	No	No
consultant	Yes	No	No	No

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

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

Other hypernyms of extension agent include adviser, advisor.

extension agent (noun)	consultant (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