Seignioral is an adjective that describes something related to a seignior, a feudal lord or landowner. Some synonyms for this word include feudal, aristocratic, lordly, pompous, grandiose, and pretentious. These words all convey a sense of grandeur and superiority, which is appropriate for describing a seignioral estate. On the other hand, more negative synonyms for seignioral might include haughty, imperious, authoritarian, or domineering. These words emphasize the negative aspects of a seignioral social structure, rather than the grandeur and nobility associated with it. Overall, there are many different words that one can use to describe the seignioral system and the people involved in it, depending on the desired tone and emphasis of the description.