The phrase "almost all" is commonly used to describe a large majority of things or people. However, there are many synonyms that can be used to convey a similar meaning. These include terms such as "nearly all," "almost every," "the majority of," and "practically all." Other options might include phrases like "a vast majority," "a great many," "the lion's share," or "an overwhelming number." Ultimately, the choice of synonym will depend on context and the specific message that is being conveyed, but using a range of terms can help to add variety and nuance to your writing or speech.