If the Anaconda is a .44 Magnum, yes, you can shoot .44 Special in it all day. Also .44 S&W American and .44 Russian if you are of a mind.
In a .44 Magnum revolver, yes. In a semi-automatic .44 Magnum (such as the Desert Eagle), no.
NO
44 magnum and 44 special.
yes.... with a 44 magnum
.44 Long? Check your cartridge again. As for your question, whatever you have, I'm almost 100% certain it won't be compatible with a .44 Magnum firearm. The only cartridge backwards compatible with the .44 Magnum is the .44 Special, and even that has limitations. .44 Special can be fired in a .44 Magnum revolver, but you need to check with the manufacturer before attempting this with a rifle, as the rifle will have a headspaced chamber.
No, you cannot. The .38 Special can be fired out of .357 Magnum revolver (but not automatics or lever action rifles), however.
Not safely. Despite the tales you have heard about this, the pressures of a .44 Magnum are well above the design pressure of a .410. WHEN (not if) the gun fails, someone is going to be hurt. No. Don't.
.44 Magnum
It can use either 44 magnum or 44 special
Yes. The 44 magnum can fire 44 special ammo in the same way a .357 magnum can use .38 Special.
There ARE rifles and revolvers chambered for the 44 magnum cartridge. If the weapon is marked ".44 Magnum" then it can be used in that weapon. You should know that there are other .44 caliber catridges, and THOSE weapons (44 Special, 44-40, etc) cannot use 44 magnum loads.