1) Hexahedron 2) Parallelepiped 3) Parallelepipedon 4) Parallelopiped 5) Parallelopipedon 1) Prism 
In geometry, a rhombohedron is a three-dimensional figure like a cube, except that its faces are not squares but rhombi. It is a special case of a parallelepiped where all edges are the same length. It can be used to define the rhombohedral lattice system, a honeycomb with rhombohedral cells. In general the rhombohedron can have three types of rho...
• (n.) A solid contained by six rhomboids; a parallelopiped.
Six sided polyhedron with each side shaped as a rhombus.
Rhom`bo·he'dron noun [ New Latin , from Greek ......... rhomb + ......... seat, base.] (Geom. & Crystallog.) A solid contained by six rhomboids; a parallelopiped. 
[n] - a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)
rhombohedron A prism with six faces, each one a rhombus.
noun a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)