acid - noun

any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

acid - adjective

• harsh or corrosive in tone
• being sour to the taste
• having the characteristics of an acid

acid - thesaurus

acerb   acerbic   acidic   acidulent   acidulous   acrid   bitter   blistering   caustic   sulfurous   sulphurous   virulent   vitriolic