More wellnigh is an expression that can be used to describe something that is almost but not quite true. There are a variety of synonyms for this phrase, including nearly, almost, practically, virtually, all but, just about, and close to. All of these terms have slightly different connotations and may be better suited for specific contexts. For example, "nearly" might be more appropriate when referring to a physical distance, while "practically" could be used to describe a situation that is functionally true but not necessarily technically so. In any case, all of these synonyms convey the idea of something being close to but not quite reaching a certain threshold.