land agent vs Realtor

land agent and Realtor both are nouns.

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

As nouns, Realtor is a hyponym of land agent; that is, Realtor is a word with a more specific, narrower meaning than land agent:

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

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