Blastocytoma is a rare type of tumor that originates from embryonic cells. Due to its rarity, there are not many synonyms available for this term, and it is often referred to by its scientific name. However, some other terms may be used in conjunction with blastocytoma, such as embryonal tumor, embryonic carcinoma, or germ cell tumor. These terms all relate to tumors that arise from embryonic cells and share certain biological characteristics with blastocytoma. While not exact synonyms, they can be useful in describing this particular type of tumor and discussing it with medical professionals.