There are several synonyms for the word "Mammillary" that can be quite useful in expanding one's vocabulary. Some of the synonyms for mammillary include mamillary, mamillate, and mamelated. All of these words refer to structures that resemble small breasts or nipples. Other synonyms for mammillary include rounded, bulging, and protuberant. These words are often used to describe physical characteristics of mammalian animals or structures that are similar in shape to mammary glands. Additional synonyms for mammillary include knobby, lumpy, and bumpy, all of which can also describe objects or body parts that have a rounded or uneven surface.