plummet Synonyms

plumb bob dive plump fall plumb drop go down tailspin drop off belly flop leapfrogging come down somersault wane submerge submerse submersion subside swoop toboggan topple tumbling tumble parachuting skydive tail off somersaulting set square plumb rule drop down fall off nosedive nose dive plop dive-bomb plumb line sounding line belly whopper belly whop belly flopper free fall tip over take a header slumping gravitate fell dwindle dives diving dove