Complex sentence: Even though the duff and Aravana are two different types of arts, the word duff is used interchangeably for Aravana, because the duff is more familiar than the Aravana.
Split into simpler sentences: Even though the duff and Aravana are two different types of arts, they are used interchangeably for the word duff and not Aravana. It is because duff is more familiar than the Aravana.