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

An underground water channel

• tumble in
• tumble over
• tumbler
• tumbler-drier
• tumbler-dryer
• tumblerful
• tumblerfuls
• tumblers
• tumbler-switch
• tumbler-switches
• tumbles
• tumble up
• tumbleweed
• tumbleweeds
• tumbling
• tumbling barrel
• tumbling box
• tumblings
• tumbrel
• tumbrels
• tumbril
• tumbrils
• tumefacient
• tumefaction
• tumefactions