stump

[1]	mystify , confuse , perplex , bewilder , flummox , foil , puzzle , baffle , confound , dumbfound/dumfound , stop , stymie , nonplus , bring up short
[2]	campaign , electioneer , canvass , (US/Canadian) barnstorm
[3]	stump up , pay up/out , contribute , donate , (Colloq) cough up , chip in , shell/fork out
[4]	mix up
[5]	stomp , stamp

[1]	tree stump , stub , butt , end
[2]	dais , podium , pulpit , rostrum , ambo , soapbox