QUICK ANSWER
"Azulejo" is a form of "azulejo", a noun which is often translated as "tile". "Baldosa" is a form of "baldosa", a noun which is often translated as "floor tile". Learn more about the difference between "azulejo" and "baldosa" below.
el azulejo(
ah
-
soo
-
leh
-
hoh
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
1. (material)
a. tile
Las paredes están adornadas con azulejos preciosos.The walls are adorned with beautiful tiles.
b. glazed tile
Los azulejos de mosaico son más caros que los lisos.Mosaic glazed tiles are more expensive than smooth ones.
la baldosa(
bahl
-
doh
-
sah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. floor tile
Las baldosas de cerámica de la cocina son blancas.The ceramic floor tiles in the kitchen are white.
b. paving stone
El sonido de las herraduras de los caballos sobre las baldosas era ensordecedor.The sound of the horses' shoes on the paving stone was deafening.