Intertwingle is a unique word that refers to things that are closely connected or interrelated. However, there are several synonyms available in the English language that can be used in place of intertwingle. Some suitable synonyms include "interweave," "entwine," "interlace," "blend," "merge," and "interconnect." All of these words have a similar meaning and can convey the same idea, but each has its unique nuance that can add depth and richness to a language. As a writer, it is important to have an extensive vocabulary and know how to use synonyms effectively to add variety and vitality to your language and writing style.