A homonym is a word that sounds the same as another word but has a different meaning and spelling. There is no other word in English that is pronounced exactly like "smile" but has a different meaning.
However, there are some words that have similar pronunciations, such as:
* Smiled: Past tense of smile.
* Smiling: Present participle of smile.
* Smiley: A word describing a smile or a happy expression.
These words are not homonyms because they are different grammatical forms of the same word or related words.