Smile
Part of speech: noun
Definition: A happy face expression using mouth, but without producing voice.
Part of speech: verb
Definition: To make a small happy face expression using mouth, (without sound.)
Example sentence: Let my soul smile through my heart and my heart smile through my eyes, that I may scatter rich smiles in sad hearts.
Grin
Part of speech: noun
Definition: A smile in which the lips are parted to reveal the teeth.
Part of speech: verb
Definition: To smile parting the lips so as to show the teeth.
Example sentence: The only people who should really sin are the people who can sin and grin.