gazelle
Hartebeest is an antelope found in Africa. It has 10 letters in the name.
Catfish
Mallard
gazelle
Sable. This is a species of antelope. Russian (red) sable paint brushes are derived from the hair of these beasts, as are elite-level Russian hats made of red sable. But some might say oribi, eland, addax, or beira.
A Pyramid is a 7 lettered 3D shape with triangular faces.
An Octogon An Octogon regular regular
Cordage
octogon
Element
leaflet
Rhebok, Royal Antelope, Roan Antelope,