The term 'more smooth' can be described by four crossword solutions: SLEEKER (7 letters), SILKIER (7 letters), OILIER (6 letters), and EVENER (6 letters). SLEEKER means having a smooth, glossy surface, while SILKIER implies a soft, smooth texture. OILIER suggests a slippery, smooth feel, and EVENER implies an even, level surface. All of these words describe the concept of something being more smooth than it was before.