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

• automatic pilot
• automatic pilots
• automatics
• automatic teller
• automatic teller machine
• automatic teller machines
• automatic tellers
• Automatic Train Protection
• automatic transmission
• automatic transmissions
• Automatic Vehicle Identification
• automatic vending
• automatic writing
• automating
• automation
• automations
• automatise
• automatised
• automatises
• automatising
• automatism
• automatisms
• automatist
• automatists
• automatize