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

• lappel
• lappels
• lapper
• lappered
• lappered-milk
• lappering
• lapper-milk
• lapper-milks
• lappers
• lappet
• lappeted
• lappet-head
• lappet-heads
• lappet moth
• lappet moths
• lappets
• lappie
• lappies
• lapping
• lappings
• Lappish
• lap-roller
• laps
• lapsable
• lapsang