2 Syllablesboreal, oriel
3 Syllablesarboreal, corporeal, marmoreal
4 Syllablesarmorial, censorial, cursorial, factorial, gressorial, incorporeal, manorial, memorial, pictorial, raptorial, sartorial, suctorial, tinctorial, tutorial
5 Syllablesaccessorial, dictatorial, directorial, editorial, equatorial, gladiatorial, immemorial, infusorial, inspectorial, mediatorial, monitorial, natatorial, piscatorial, preceptorial, senatorial, territorial
6 Syllablesaccusatorial, ambassadorial, combinatorial, exterritorial, gubernatorial, inquisitorial, visitatorial
7 Syllablesextraterritorial