The phrase "be symptomatic of" implies that something is indicative of a larger issue or problem. Some synonyms for this phrase include "point to," "hint at," "suggest," "imply," "reveal," "signal," and "betray." These words all convey the idea that a particular symptom or sign is a clue or hint about an underlying problem. For example, if a constant cough is symptomatic of a respiratory illness, it could also "reveal" or "signal" that something is wrong with the person's overall health. By using various synonyms, a speaker or writer can add nuance to their language and emphasize different aspects of the diagnostic process.