Mammillation refers to the process of forming or developing a breast-like shape or structure. Some synonyms for this word include breast-shaped, nipple-like, mammary, and teat-like. Other related terms that can be used to describe this process include mamilliform, mamillated, mammiferous, and mammatiform. These terms are often used in scientific or medical contexts to describe the growth and development of breast tissue, as well as other structures that resemble mammalian mammary glands. In everyday language, these terms may also be used to describe certain shapes or structures that resemble breasts, such as a rounded mound or a protruding bump.