Rain Reign by Ann M. Martin

Do you know what a homonym is?  A word that sounds the same as other words but have different meanings – for example, chews and choose.  Rose is obsessed with homonyms.  She even gave her dog a homonym name: Rain.  Rose’s life isn’t always easy – her rules and obsessions sometimes set her apart from other kids – but coming home to Rain always makes things a little better.  When a hurricane hits Rose’s town and Rain goes missing, Rose knows that she’s the only one who can find her, even if it means going out alone.