"Almost entirely" is a common phrase used to describe something that is almost completely true or present, but not entirely. However, there are various synonyms that can be used in place of this phrase to add more depth and specificity to the sentence. Some of these include "virtually all", "nearly all", "practically all", "almost wholly", "for the most part", and "largely". These alternatives can help the writer convey a more precise message while still indicating that something is not quite 100% complete. When choosing a synonym for "almost entirely", it is important to consider the context and tone of the sentence.