rivet - noun

ornament consisting of a circular rounded protuberance (as on a vault or shield or belt)

heavy pin having a head at one end and the other end being hammered flat after being passed through holes in the pieces that are fastened together

rivet - verb

• direct one's attention on something
• fasten with a rivet or rivets
• hold (someone's attention)

rivet - thesaurus

center   centre   concentrate   focus   pore   stud