There are many synonyms for the phrase "shouting at". Some more polite phrases to use could be "raising your voice to", "speaking loudly in frustration", or "expressing your feelings vocally". Other synonyms with a more negative connotation include "yelling at", "berating", "scolding", or "reprimanding". It's important to choose your words carefully in order to communicate effectively and politely. Finding the right synonym can make a difference in how your message is received and understood by others. Ultimately, it's best to avoid shouting or using negative language when possible, and instead try to communicate calmly and respectfully.