floor

[1]	knock over/down , bowl over , prostrate , fell , overthrow , bring down , (make) fall , beat , defeat , conquer , destroy , rout , overwhelm , crush , whip , trounce , thrash , drub , best , worst
[2]	stump , bewilder , baffle , dumbfound/dumfound , confuse , confound , disconcert , nonplus , perplex , puzzle , astound , astonish , amaze , surprise , shock
[3]	shock , ball over , blow out of the water , take aback
[4]	deck , coldcock , dump , knock down

[1]	flooring , flooring , parquet , boarding , planking , (Nautical)/(Colloq) deck
[2]	storey , level , storey , level , deck , story
[3]	base , minimum , bottom , base , lower limit , lowest (level)
[4]	trading floor