pricker

noun

1. One who pricks.
2. A tool for pricking.

   “The pricker was used to level the fire half-way up the bank and that was that.”

3. A prickle or thorn.
4. Any of several American prickly woody vines of the genus Smilax; greenbrier.
5. One who spurs forward; a light-horseman.

   “The prickers, who rode foremost, […] halted.”

6. A priming wire; a priming needle, used in blasting and gunnery.
7. A small marlinespike used in sailmaking.