heptahedron 

A heptahedron ( pl. : heptahedra) is a polyhedron having seven sides, or faces. A diminished cube, realized with 4 equilateral-triangle and 3 kite faces, all having the same area, A heptahedron can take a large number of different basic forms, or topologies.
wikipedia

heptahedron

heptahedron by chargingvindiction4 August 21, 2024

Hexahedron 

A very fancy and complex way to say cube. Rarely anyone says it this way.

Hexa- (six) -hedron - (polyhedron)

A six sided polyhedron

Dude look at that hexahedron

Hexahedron by A.U.S August 15, 2023