cliff diving diving into the water from a steep overhanging cliff
flip a dive in which the diver somersaults before entering the water
full gainer,
gainer a dive in which the diver throws the feet forward to complete a full backward somersault and enters the water feet first and facing away from the diving board
half gainer a dive in which the diver throws the feet forward and up to complete a half backward somersault and enters the water facing the diving board
jackknife a dive in which the diver bends to touch the ankles before straightening out
dump,
plunge drop (stuff) in a heap or mass; "The truck dumped the garbage in the street"
descend,
come down,
go down,
fall move downward and lower, but not necessarily all the way; "The temperature is going down"; "The barometer is falling"; "The curtain fell on the diva"; "Her hand went up and then fell again"
power-dive make a power dive; "The airplane power-dived"
nosedive plunge nose first; drop with the nose or front first, of aircraft
duck to move (the head or body) quickly downwards or away; "Before he could duck, another stone struck him"