plummet /plumˈit/

To plunge headlong

To fathom, sound

1. A leaden or other weight, esp on a plumb line, sounding-line, or fishing-line
2. A plumb rule

• pennatulaceous
• pennatulae
• 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