Gate-crashing refers to forcefully entering an event or gathering without an invitation or permission. There are several words that can be used as synonyms for gate-crashing such as intruding, barging in, crashing, invading, and infiltrating. These words convey the same meaning and intent as gate-crashing. They all suggest an uninvited and unwelcome presence. Other terms that can be used include uninvited entry, unauthorized access, sneaking in, and unannounced infiltration. Using these synonyms when communicating about gate-crashing adds variety and flair to one's language and allows for more expressive communication.