The term "bottom-rung" refers to the lowest position in a hierarchy or ladder. Its antonyms include "top-tier," "upper echelon," or "high-ranking." These words denote positions of power, prestige, and influence. Other antonyms include "elite", "premier," and "exclusive," suggesting that the person or thing being described is of the highest quality or caliber. In contrast, synonyms for "bottom-rung" include "lowly," "subordinate," and "menial," which connote a lack of status or importance. Regardless of their connotations, all of these words are useful for conveying different shades of meaning and context in a variety of situations.