The word "nippled" refers to something having nipples or protruding nipples. Some synonyms for "nippled" could be "nipple-bearing," "teat-y," "breast-like," "areolar," or "papilla." Other related terms may include "nubbin," "knob," or "button" - depending on context. It's important to note that some of these terms may be more appropriate in certain contexts than others. For instance, "papilla" may be a more technical term used in medical or scientific writing, while "teat-y" might be more colloquial. Ultimately, the synonym used will depend on the writer's intended tone and audience, and context.