coin / quoin (coign, coigne) [koɪn]
coin – n. – a metallic piece produced by any country to represent its money; v. tr. – to fabricate or invent (words, phrases, etc.)
quoin (coign, coigne) – n. – 1. an external corner of a wall; 2. keystone; 3. a wedge or an expanding device used to lock type up in a chase