Spine
Part of speech: noun
Definition: A person or thing's backbone; the series of bones collectively from one's (literal or figurative) head to tail or pelvis. A rigid, pointed surface protuberance or needle-like structure on an animal, shell, or plant. Courage or assertiveness. The narrow, bound edge of a book.
Example sentence: What an electric thrill it sends up and down the spine, how it sets the heart racing: A Royal Romance! A Royal Wedding! The pomp and the pageantry!
Pricker
Part of speech: noun
Definition: One who pricksA tool for prickingA prickle or thorn