There are various synonyms available for the word "alienator". The word alienator basically describes a person who causes separation or disunity between individuals or communities. One of the synonyms for alienator is "divisor", which refers to someone who creates divisions or fractures among people. Another synonym for alienator is "estranger", which means a person who moves apart from something or someone. Additionally, one can use the word "separatist" to refer to an alienator, which pertains to someone who advocates for segregation or distinctness. Using alternate synonyms for the word alienator can add more depth and meaning to a piece of writing or conversation.