There are various synonyms for the term "skin tumor," which is a growth that appears on the skin surface. Some of the other terms used to describe skin tumors include melanoma, basal cell carcinoma, squamous cell carcinoma, skin cancer, and neoplasm. Melanoma is a type of skin cancer that usually arises from the pigmented cells in the skin, while basal cell carcinoma and squamous cell carcinoma are the two most common types of skin cancer that arise from the keratinocyte cells. Neoplasm is a general term used to describe the abnormal growth of cells, which can be non-cancerous or cancerous. It is essential to diagnose and treat skin tumors promptly to prevent them from spreading and becoming malignant.