The crossword solution for the term DIAMOND OR SEDAKA is NEIL, which is a four letter word. Neil Diamond is an American singer-songwriter and musician with a career spanning over five decades. He is known for his numerous hit songs such as 'Sweet Caroline' and 'America'. Neil Sedaka is an American singer, songwriter, pianist, and composer who has been writing and performing music since the 1950s. He is best known for his hits 'Breaking Up Is Hard To Do' and 'Love Will Keep Us Together'.