Is smiled a common noun

No, the Word 'smiled' is not a noun.

The Word 'smiled' is the past tense of the verb to smile.

The Word 'smile' is both a verb and a noun.

The noun 'smile' (smiles) is a common noun, a general Word for a pleased, kind, or amused facial expression; a Word for any smile of any kind.

Examples:

Mom smiled when I showed her my report card. (verb)

She said, "Your dad will smile when he sees this." (verb)

It was nice to see the smile on mom's face. (noun)