pentalogy /pen-talˈə-ji/

1. A pentad, esp of published works
2. A series of five related books

• counter-irritation
• counter-irritations
• counter-jumper
• counter-jumpers
• counterlight
• counterlights
• counterman
• countermand
• countermandable
• countermanded
• countermanding
• countermands
• countermarch
• countermarched
• countermarches
• countermarching
• countermark
• countermarks
• countermeasure
• countermeasures
• countermen
• countermine
• countermined
• countermines
• countermining