PLUNGE, dip, souse, duck; dive, plump; take a -plunge, - header [colloq.]; make a plunge; bathe (water) [See Water]; pitch.
SUBMERGE, submerse; immerse; douse or dowse, sink, engulf, send to the bottom; send to -Davy Joness locker, - feed the fishes.
FOUNDER, welter, wallow; get out of ones depth; go to the bottom, go down like a stone.