octahedron/oktəʹheedrən/ noun (pl octahedrons octahedra /-drə/)

• headquartered
• headquarters
• headrace
• head register
• headrest
• headroom
• headscarf
• headset
• headship
• headshrinker
• headsman
• headspring
• headstall
• headstock
• headstone
• headstrong
• heads will roll
• head teacher
• head-to-head
• head-up
• head voice
• headwater
• headway
• headwind
• headword