What is another word for crasher?
Pronunciation: [kɹˈaʃə] (IPA) 
Crasher is a word which implies an individual or entity which enters an event without being invited or without permission. There are several synonyms available for this term, like intruder, gatecrasher, interloper, trespasser, and invader. Each of these words has its own connotations, but all convey the sense of someone or something being unwelcome. An intruder may imply a potential threat to one's safety or privacy, while a gatecrasher may refer specifically to someone attempting to join a social event to which they weren't invited. Regardless of context, these synonyms indicate that someone or something has crossed a boundary without proper authorization.
