What is another word for "bitter"?

Roget's Thesaurus (1911) lists these synonyms for "bitter": acerbity, acrid, acridity, acrimonious, acrimony, against, amaritude, and, antagonist, assafoetida, astringency, astringent, austerity, back, bad, being, bite, biting, bitterness, can, disgust, empyreuma, empyreumatic, enemy, every, fetid, fetor, fitchet, fitchew, foe, foeman, foul, foulness, friend, from, frouzy, fulsome, fungus, fusty, gall.