triapsidal /trī-apˈsi-d(ə)l/

With three apses (also triapsˈal)

• pennatulas
• penne
• penned
• penneech
• penneechs
• penneeck
• penneecks
• penner
• penners
• pennes
• pennied
• pennies
• pennies from heaven
• penniform
• penniless
• pennilessness
• pennilessnesses
• pennill
• pennine
• pennines
• penning
• penninite
• Pennisetum
• pennon
• pennoncel