This pack renames TNT to "Trinitrotoluene," which is the full unabbreviated name of TNT. It only changes TNT's name in the lang file (as well as TNT minecarts and every other mention of TNT), it doesn't change any textures.
If for some reason you wanted to change the texture of TNT to have the word Trinitrotoluene instead of TNT, copy the pack.png, change the name to tnt_side.png, and put it in assets/minecraft/textures/block.
I don't know why anyone would want this but I made it for some reason and felt I might as well upload it.
Also I made a version of this pack for every possible version it would work in (1.6.1 - 1.20.x) because I thought it was funny