ballium means synonym of bailey (“fortification”). Lexicurio rates it Sui generis — a strength score of 87 out of 100.
noun
- Synonym of bailey (“fortification”).“[T]he southern court of the ballium had become a flower-garden, with quaint terraces, statues, knots of flowers, clipped yews and hollies, and all the pedantries of the topiarian art.”