TALK EFFUSIVELY is an expression that means to talk in an overly enthusiastic and emotional manner. The crossword solutions GUSH and GOON are both four letter words that can be used to describe this type of behavior. GUSH is defined as to express one's feelings or opinions in an excessive and unrestrained way, while GOON is defined as a foolish or stupid person who talks too much. Therefore, the crossword solutions GUSH and GOON can be used to describe someone who talks effusively.