@Pandya Yes , BTW , excellent answer , Nice find Keep it up , I saw the PrasthAna bheda mentioning while searching , is focusing on vedic texts. Hope i will find the other definitions also.
I actually wanted to read Thiruvilaiyadal Puranam. Then I came to know that Thiruvilaiyadal puranam is a Tamil version of Halasya Mahatmyam. So, this Mahatmyam is not a part of Skanda Purana?
@NarayanaSharma Not sure. Maybe significance of places in Kerala and tamilnadu are explained in this khanda. There's also Sahyadri Khanda which describe places along Krishna River. Maybe it is not available online.