Most people just call it "Paral" for short. I don't think it has any other street names but I'm not 100% on this, as street lingo changes rapidly.
Yes, Paraldehyde is known to be addictive. Paraldehyde is a pain medication and sedative that used to be used to ease childbirth pain.
Ecstasy
a kind of marijuana or a street name for the drug Datura
Heroin
You've failed to mention it's name or chemical composition.
Speed is the street name for Amphetamine, and Methamphetamine which are drugs.
Well, speed is the street name of a type of drug, do you mean what other street names mean speed?
Which drug? Marijuana has dozens of street names, such as pot, weed, herb, green, Mary Jane, smoke, bud, chronic, dank, etc, etc, etc. Likewise, every other illegal drug has a number of street names associated with it.
Sedative
Goey is an Australian street name for speed (amphetamine).
Yes, I believe it is heroin I'm not sure though
pot. weed. grass. green. chronic. smoke. bud.