Arenicolous is a word that describes something that lives or burrows in sand or sandy soil. There are several synonyms that can be used instead of arenicolous, including psammophilous, sabulicolous, harenicolous, and arenarious. Psammophilous is derived from the Greek word "psámmos," which means sand, and "phílos," meaning friend or lover. Sabulicolous also derives from the Latin word "sabulum," meaning sand. Harenicolous comes from the Latin word "harena," which means sand pit. Arenarious is an adjective that is used to describe any sandy area or terrain. These synonyms can be used interchangeably to add variety to your writing.