When it comes to finding synonyms for the phrase "a top", there are a multitude of options available. Some alternatives could include "on the summit", "atop", "in first place" or "leading the pack". Alternatively, "foremost", "uppermost" or "at the head" can also be used to convey a similar meaning. Other words like "superior", "dominant", "premier" or "supreme" can also be employed to highlight the idea of being on top or ahead. Moreover, phrases such as "in the highest position", "the best" or "the number one" may also serve as effective synonyms in various contexts. Ultimately, the choice of synonymous expression will depend on the intended meaning and the specific context in which it is used.