marijuana is pot, weed, cannabis, green, Mary Jane, ganga, grass, and many more.
Psilocybin mushroom is refereed to as shrooms, magic mushrooms, not much else.
LSD is also called acid
MDMA would be ecstasy, E, X, XTC
what a bong is is a smoking device that is like a very large pipe, almost, only it filters the smoke with water, the smoke must pass though the water, this makes the water bubble when someone sucks in smoke.
a vaporizer, well, it vaporizes weed... it is a device you would usually plug into your wall, and turn on, it has a heater in it, the heater heats up the weed, it can be set to different temperatures, set to around 170 C (340 F) it releases the chemicals from marijuana into air, this way the user inhales hot air that contains the drug. put it at a higher temperature, and it provides smoke, but there is no fire, and so it last a lot longer and none of the drug is wasted.