Synonyms for Acerb:

adj.

all (adjective)
astringent, acerbic.
sour (adjective)
acid, acrid, acerbic, bitter, tangy, sharp.

n.

dry, taste, tangy. acerb (noun)
sour, caustic, venomous, virulent, sharp, astringent, acid, unpleasant, acrid, sulphurous, acerbic, sulfurous, blistering, vitriolic, bitter.

Other synonyms:

tangy. dry. Other relevant words:
acerbic, tangy, dry, taste.