Achromatosis is a medical condition that results in the loss of pigmentation in the skin, hair, and eyes. Though there aren't many synonyms for this specific term, there are some related medical conditions that share similar symptoms. For instance, vitiligo is a skin condition that causes the skin to lose its pigment in patches. Albinism is a rare genetic condition that also causes a lack of pigment in the skin, hair, and eyes. Hypopigmentation is another term that can be used to describe a general loss of pigmentation, which could be caused by various medical conditions. While these words aren't exact synonyms for achromatosis, they do describe similar conditions and symptoms.