katabothron /kat-ə-bothˈron/ or katavothron /ka-tavˈo-thron/

An underground water channel

• sophomore
• sophomores
• sophomoric
• sophomorical
• sophs
• Sophy
• sopite
• sopited
• sopites
• sopiting
• so please you
• sopor
• soporiferous
• soporiferously
• soporiferousness
• soporific
• soporifics
• soporose
• soporous
• sopors
• sopped
• soppier
• soppiest
• soppily
• soppiness