pentad /penˈtad/

1. A set of five things
2. A period of five years or five days
3. An atom, element or radical with a combining power of five

• Phaenogamae
• phaenogamic
• phaenogamous
• phaenogams
• phaenologies
• phaenology
• phaenomena
• phaenomenon
• phaenotype
• phaeo-
• phaeomelanin
• Phaeophyceae
• Phaethon
• Phaethontic
• phaeton
• phaetons
• phag-
• -phaga
• -phage
• phage
• phagedaena
• phagedaenas
• phagedaenic
• phagedena
• phagedenas