double
tetrahedralization
balance
demicircle
dual
trifluoromethanesulfonate
isosceles triangle
Scarpa's triangle
bifarious
pyramidically
pyramidwise
bifold
twi-
isodual
tetrahedric
tetrahedralize
triangulate
Catalan solid
di-
Clar's hydrocarbon
bitterweed
twosome
hemicycle
resuperimposed
oxygon
hyperbolaeon
biconjugate
step
twain
pyramidal
pentachoron
scalene triangle
pyramidoid
tweenhood
dualic
tetrameral
tetrakaidekahedral
triformity
explementary angles
coquasitriangular
triangulately
multispired
CN Tower
quartically
midcircle
orthotetrahedron