[{"Bold_text": "noun", "List Items": ["the part of a hammer for striking.", "a shark of the genus Sphyrna,especially S. zygaena,having the head laterally so as to resemble a double-headed hammer , sometimes dangerous to swimmers.", "Also calledham·mer·kop[ham, -er-kop]. a brown heronlike African bird,Scopus umbretta,having the head crested as to resemble a claw hammer claw hammer.", "flatheaded borer flatheaded borer.", "Slang.blockhead; dunce; lout."]}]