Dodecahedron: A dodecahedron is any polyhedron with twelve flat faces, but usually a regular dodecahedron is meant.
Icosahedron: An icosahedron is a regular polyhedron with 20 identical equilateral triangular faces, 30 edges and 12 vertices.
Icosidodecahedron: An icosidodecahedron is a polyhedron with twenty triangular faces and twelve pentagonal faces.
