Realtor vs land agent

Realtor and land agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
Realtor	Yes	No	No	No
land agent	Yes	No	No	No

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

Realtor: a real estate agent who is a member of the National Association of Realtors
land agent: a person who is authorized to act as an agent for the sale of land

Other hypernyms of Realtor include estate agent, house agent, real estate agent, real estate broker.

Realtor (noun)	land agent (noun)
a real estate agent who is a member of the National Association of Realtors	a person who administers a landed estate
	a person who is authorized to act as an agent for the sale of land