Protuberantly is an adjective that describes something that is visibly bulging or sticking out. Synonyms for protuberantly include bulging, protruding, jutting, projecting, swelling, and swellingly. These terms can convey a similar sense of prominence or bulging, but may be used in different contexts depending on the specific item being described. Other potential synonyms for protuberantly might include terms like distended, inflated, expanded, or prominent, depending on the precise qualities of the object in question. Overall, the term protuberantly describes a specific type of physical appearance, and identifying synonyms requires understanding the physical structures being described.