There are several synonyms for the term "point of accumulation" depending on the context in which it is used. In the field of mathematics, "accumulation point" is often used to refer to the limit of a sequence or set of numbers. In statistics, "breakpoint" may be used to describe a point at which a trend or pattern changes. In the context of traffic, "bottleneck" or "traffic jam" could be an appropriate synonym for a point of accumulation. In business, "stockpile," "inventory," or "stockpile" could refer to an accumulation of goods or supplies. Ultimately, the most appropriate synonym will depend on the specific context in which the term is being used.