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

• abrogate
• air-jacket
• air-jackets
• air kiss
• air-kiss
• air-kissed
• air kisses
• air-kisses
• air-kissing
• air-lane
• air-lanes
• air layering
• airless
• airlessness
• airlessnesses
• air letter
• air letter form
• air letters
• air lieutenant
• air lieutenants
• airlift
• airlifted
• airlifting
• airlifts
• airline