A laugh may be a sudden, voiceless exhalation, but is usually an audible sound, either soft or loud: a hearty laugh.
Chuckle suggests a barely audible series of sounds expressing private amusement or satisfaction: a delighted chuckle.
A smile is a (usually pleasant) lighting up of the face and an upward curving of the corners of the lips (which may or may not be open); it may express amusement or mere recognition, friendliness, etc.: a courteous smile.
A grin, in which the teeth are usually visible, is like an exaggerated smile, less controlled in expressing the feelings: a friendly grin.
What are the other forms of laugh/smile/chuckle?
Can anyone add similar words which express the same idea..?
Hi, here are some more: