There are several synonyms for the term "apatetic coloration," which refers to the lack of color or pigmentation in an organism's skin or hair. One synonym is "achromia," which is a medical term used to describe a lack of pigmentation. Another synonym is "albino," which specifically refers to an organism that lacks melanin, resulting in white or very light-colored skin, hair, and eyes. "Leucism" is another synonym that refers to a partial loss of pigmentation, resulting in white or light-colored patches on an otherwise normally pigmented organism. Finally, "hypomelanosis" is a synonym that describes a decreased amount of melanin in an organism's skin or hair.