decagonal
dodecagonal
dodecahedral
eightfold
eighth
heptagonal
hexagonal
hexahedral
icosahedral
octadic
octahedral
octal
octan
octaploid
octastyle
octofid
octonary
octosyllabic
octuple
pentagonal
pentahedral
Gothic
Plexiglas
conical
cylindrical
domed
high-ceilinged
octagon
ornate
pillared
pyramidal
quadrangular
rectangular
roofless
semicircular
topmost
trapezoidal
two-storied
windowless
wooden
wrought iron
diagonal