The term 'smiley face, e.g.' can be represented by two crossword solutions: 'ICON' (4 letters) and 'ideogram' (8 letters). An ICON is a small image or symbol that is used to represent an idea, object, or concept. An ideogram is a graphical representation of a concept or idea, usually composed of a single symbol or character. The most common example of an ideogram is the smiley face, which is used to express emotions such as happiness, joy, and excitement.