"Unkinglike" refers to behavior or qualities that are at odds with the behavior of a king or a ruler. It implies a departure from regal or dignified conduct. When searching for synonyms to describe such behavior, terms like "unregal", "unroyal", and "undignified" come to mind. These words suggest a lack of grace, poise, or majesty. Additionally, parallel synonyms such as "unprincely", "inappropriate" or "unbecoming" can also be used to highlight the unsuitability of certain actions or characteristics for someone in a position of power or prominence. Ultimately, these synonyms help convey the notion of behaviors that deviate from the expected behavior of a king or a ruler.