tumble
tum-ble
verb
To fall suddenly and clumsily, often losing balance and control.
"The child tumbled down the stairs."
noun
A sudden, uncontrolled fall or drop, often causing minor injury.
"He took a nasty tumble on the ice."
Thesaurus
Synonyms: fall, spill, whirl around, whirl, topple, tip, collapse, crumple, crumble, break down, get onto, get wise