In one of my stories, I have a character who perpetually smiles. One of the most chipper people you'd ever meet. She rarely drops her smile, even when things are looking bad and bleak. A problem comes with this however: there aren't that many synonyms for "smile." I used smile, grin, beam... and I can't think of any more. I've tried looking in a thesaurus, but I couldn't find any more there either. Now, I know there are different words to describe upward movement of the lips, like smirking, etc. But smirking implied deviousness and I'm looking for words that mean just a genuine, sincere smile. Are there any more than those three?