Synonyms for Astringent (same or very similar meaning)
WordNet sense 1 (a drug that causes contraction of body tissues and canals):
astringent drug
WordNet sense 2 (sour or bitter in taste):
acerbic, acerb
WordNet sense 3 (having a sharp biting taste):
sour
WordNet sense 4 (tending to check bleeding by contracting the tissues or blood vessels):
styptic
From the ODE community, based on WordNet
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