Differences between Smiles and LaughsSmile and Laugh. These two words all known to all of us. We use these words very often. We use both of them as Synonyms. We interchange these words. We say the boy is laughing and at the same time we may say the boy is smiling. But there is some difference between these two. Both words can be used as nouns or verbs.
When you laugh your teeth are visible whereas when you smile no teeth are visible.
When you laugh you will open your mouth whereas when you smile you need not open your mouth.
When you laugh you are bound to make a noise whereas when you smile you need not make any noise.
A smile is a positive expression whereas a laugh need not be a positive expression always. Sometime it may be a negative expression also.
Please add any other differences you know to this list, dear members.