1. A solid figure having five equal sides.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• oentahedron,
• lentahedron,
• -entahedron,
• 0entahedron,
• pwntahedron,
• psntahedron,
• pdntahedron,
• prntahedron,
• p4ntahedron,
• p3ntahedron,
• pebtahedron,
• pemtahedron,
• pentahedrin,
• pentaheron,
• pentahadron,
• pentadron,
• Pentahedren,
• Pentahedrane,
• Pintahedron,
• Pentahaedron

• pentathlon,
• pentothal,
• pentatonic.

The adjective form of the word "pentahedron" is "pentahedral".