What is another word for ever since?
Pronunciation: [ˈɛvə sˈɪns] (IPA) 
Ever since is a phrase that is frequently used to indicate a continuous action or state of being that occurred in the past and continues up to the present. However, there are many other synonyms for this phrase that can help to vary your writing and better express your ideas. Some potential options include "since then," "from that point forward," "since that time," "since that moment," "in the intervening period," "over the past few years," and "throughout the duration of." Whether you are trying to convey a sense of history, continuity, or ongoing action, these synonyms can help you to strengthen your writing and convey your intended message.
