OXFORD DICTIONARY
angostura, n. (in full angostura bark) an aromatic bitter bark used as a flavouring, and formerly used as a tonic and to reduce fever.
Angostura Bitters propr. a kind of tonic first made in Angostura.
Angostura, a town in Venezuela on the Orinoco, now Ciudad Bol{iacute}var
ROGET THESAURUS
angostura
Bitterness
N
bitterness, acridness, acridity, acrimony, caustic, alkali, acerbity, gall, wormwood, bitters, astringent bitters, Angostura, aromatic bitters, sourness, pungency, alkaloids, turmeric, bitter, bitterish, acrid, acerb, acerbic, bitter as gall, bitter pill to take, sugar coating on a bitter pill.