* "Her smile lit up the room." (Here, "smile" refers to the physical expression of happiness on her face.)
* "A small smile played on her lips." (This describes a subtle, fleeting expression.)
* "The children's smiles were contagious." (This emphasizes the effect of their smiles on others.)
* "He gave me a smile of encouragement." (Here, "smile" is used to describe the type of smile, indicating its meaning.)
* "A smile is the best medicine." (This is a common saying where "smile" represents the feeling of happiness itself.)
These are just a few examples, and you can use "smile" as a noun in many different ways depending on the context and what you want to express.