In Oakland, a bomb squad removed 5 pounds of long-stored TNT from a residential neighborhood on Wednesday. Better TNT than dynamite, experts say. Both are high explosives, and the terms are often used interchangeably, but they shouldn't be.
Here's a handy tip from Mentalfloss.com on how to tell the difference: "If it's a white powder found in sticks, it's dynamite. If it's a yellow crystal, it's TNT. Use this little mnemonic to remember dynamite's inventor: 'Winning a Nobel Prize would be dynamite!' The alternative, that winning would be TNT, just doesn't make any sense."
For a full explanation, read the full text here: http://www.mentalfloss.com/difference/tnt-vs-dynamite