This is the 5260th most frequent Spanish word.
inmobiliario
Related to real estate or property.
Here, 'inmobiliario' is used as an adjective to describe the 'mercado', indicating that the market pertains to real estate.
El mercado inmobiliario está en constante crecimiento.
The real estate market is in constant growth.
In this sentence, 'inmobiliaria' is attributing the fair ('feria') as being related to the real estate sector.
Compramos muebles en una feria inmobiliaria.
We bought furniture at a real estate fair.
'Inmobiliario' is again an adjective and here it qualifies 'agente', specifying their profession as related to the real estate field.