"Top-hole" is an adjective used to describe something of the highest quality or excellence. Its antonyms could be words such as inferior, poor, mediocre, or subpar. These words convey the opposite meaning of being below average or lacking in quality. Another possible antonym is ordinary, which refers to something average or common.
In contrast, excellent, outstanding, or exceptional could be considered synonyms for "top-hole." These words convey a sense of superiority and indicate that something or someone is in a league of their own. In summary, the antonyms for "top-hole" emphasize the lack of quality or excellence, while its synonyms underscore the exceptional nature of something or someone.