vacant - empty, not being used⏎
scheme - plan, system⏎
terminate - end, conclude, close, finish, discontinue⏎
sound - reliable, sensible when making decisions, undamaged, good and thorough, in good condition⏎
unmanageable - uncontrollable, disobedient, difficult to deal with⏎
tier - level, layer, series⏎
rules - regulations, orders⏎
zeal - keenness, willingness, enthusiasm⏎
unlawful - illegal, illicit⏎
unfriendly - hostile, opposing, antagonistic⏎