Saw an advertisement and went to Google it. Turns out, in English, there are no and never were words like realtor or realtors.
“REALTOR” is a trademark in the USA and Canada. It is used to designate licensed real estate agents who are members of the National Association of Realtors (NAR) in the USA or the Canadian Real Estate Association (CREA) in Canada. This term specifically denotes qualified real estate agents who meet the criteria set by these organizations.

