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

pentadˈic adjective

• Rickettsiales
• rickettsias
• ricketty
• rickety
• rickey
• rickeys
• ricking
• rickle
• rickles
• rick-lifter
• rick-lifters
• rickly
• rick-rack
• ricks
• ricksha
• rickshas
• rickshaw
• rickshaws
• rickstand
• rickstands
• rickstick
• ricksticks
• rickyard
• rickyards
• RICO