Alla Prima 

Alla prima is a painting technique that describes a direct painting approach to the surface. Paint is applied wet on wet, generally without letting earlier layers dry if using oils. Acrylics can be kept wet or use a dry halftone or fusion type techniques. In Italian, Alla prima means "at first attempt", which means it is normally done in one sitting.

Painterly 

Painterly describes a certain look or qualities of a painting that are distinct to an artist or brush style emphasizing the art of painting. These qualities include brush calligraphy, use of color, style, textures, and techniques. ... Artists with a painterly style include Vincent van Gogh, Claude Monet, John Singer Sargent and many of today's modern impressionists.