" vehemence "

1: the quality or state of being forceful (as in expression);

  * e.g., " ... the vehemence in her voice when she insisted that she never gossiped surprised me "

•  Synonyms : 

•  aggressiveness,

•  assertiveness,

•  emphasis,

•  fierceness,

•  forcefulness,

•  intenseness,

•  intensity,

•  vigorousness,

•  violence

•  Antonyms : 

•  feebleness,

•  mildness,

•  weakness

2: depth of feeling;

  * e.g., " ... every cause that she pursues is pursued with great vehemence "

•  Synonyms : 

•  ardency,

•  ardor,

•  emotion,

•  enthusiasm,

•  fervency,

•  fervidness,

•  fervor,

•  fire,

•  heat,

•  intenseness,

•  intensity,

•  passion,

•  passionateness,

•  violence,

•  warmth,

•  white heat

•  Antonyms : 

•  impassiveness,

•  impassivity,

•  insensibility,

•  insensibleness,

•  insensitiveness,

•  insensitivity