The term GRIN is used to describe a facial expression that can range from a subtle SMILE to a wide-mouthed LAUGH. The crossword solutions BEAM (4 letters), SNEER (5 letters), LAUGH (5 letters), SIMPER (6 letters), SMIRK (5 letters), SMILE (5 letters), and LEER (4 letters) all describe different types of grins. BEAM is a broad, cheerful SMILE, SNEER is a contemptuous or mocking expression, LAUGH is an expression of joy or amusement, SIMPER is a silly, self-conscious SMILE, SMIRK is a sly, knowing SMILE, SMILE is a pleasant expression of happiness, and LEER is a suggestive or lecherous look.