i think it's flop
flop
floor, flood, droll, drool, dolor
Dislocate
Yes. It means in a heavy, weighty, or extensive manner. "He fell heavily to the floor." "The device was heavily modified to withstand underwater pressure."
A carpet or a runner are things that cover the floor and have 6 letters. Enamel as in enamel tile is also a possibility, but less likely if you are doing a crossword or something like that.
floor polisher are used to polish floor.
Vaulting over the port gunwale to the safety of the boat's open deck, I chortled as I landed heavily in it. The plumber's tool bag landed heavily on the marbled tile floor. The smell of death hung heavily in the misty morning air.
Shrimp
rug or mat
rug
mat
Roll on the floor laughing / with laughter