Vitriol

Noun

 * 1)  sulphuric acid and various metal sulphates
 * 2)  bitterly abusive language; invective or vituperation

Derived terms

 * vitriolic
 * oil of vitriol
 * blue vitriol
 * green vitriol
 * hurl vitriol
 * iron vitriol
 * white vitriol

Verb

 * 1) to subject someone to bitter verbal abuse

Thesaurus
acrimony, animosity, animus, bad blood, bitter feeling, bitterness, feud, gall, hard feelings, ill blood, ill feeling, ill will, rancor, soreness, sourness, vendetta, venom, venomousness, virulence