yes you can'
A face is a flat surface. The only solid with no flat surfaces is a sphere.
A face.
pentagon
A cone fits the description.
A hexahedron is a solid with six plane faces, and a cuboid is a six-sided figure each face of which is a rectangle.
A cone+++The original answer also had "Cube", which is obviously wrong!
Octohedron
cylinder
square-based pyramid
A face.
Base.
If it's a flat figure (2 dimensional), it's a heptagon.If it's a solid object (3 dimensional), it's a heptahedron.Hepta is the Greek for seven