Piliferous refers to anything that has hair-like structures, such as plant stems or animal appendages. If you're looking for synonyms for the word piliferous, there are a few that come to mind. One such synonym is "ciliate," which refers to anything that has tiny hairs or cilia on its surface. Another similar term is "setaceous," which describes anything that is bristly or covered in a dense coat of hairs. You might also use the word "trichoid," which refers specifically to hair-like structures on a microscopic level. Other possible synonyms could include "hair-covered," "hairy," or "furry," depending on the context and the specific object being described.