There are a few potential synonyms for the word "bicornuous," but they may depend on the context in which the word is being used. One possible option could be "two-horned," as bicornuous often refers to having two prominent and pointed protrusions. Another possibility could be "dichotomous," which similarly suggests a division or splitting into two distinct parts. It could also be described as "bifurcated" or "forked," emphasizing the two-pronged structure of the object in question. Ultimately, the most appropriate synonym will depend on the specific nuances and connotations of the original term.