【Enmity】 , 【hostility】 ,  【antipathy】 ,  【antagonism】 ,  【animosity】 ,  【rancor】 ,  【animus】  mean intense deep-seated dislike or ill will or a manifestation of such a feeling.

【Enmity】 implies more than the absence of amity or a friendly spirit; it suggests positive hatred which may or may not be dormant or concealed.

【Hostility】 suggests strong and usually open 【enmity】 manifesting itself actively (as in warfare, in violent attacks, or in ostracism).

【Antipathy】  and  【antagonism】  usually imply a temperamental or constitutional basis for one′s hatred or dislike.

【Antipathy】 suggests aversion or repugnance and often, in consequence, avoidance or repulsion of the person or thing hated.

【Antagonism】 stresses the clash of temperaments and the quickness with which hostilities are provoked or the spirit of resistance is aroused.

【Animosity】  and  【rancor】  denote emotions of such intensity or violence that they may, if not given release, provide the ground for active 【hostility】 .

【Animosity】 usually suggests anger, vindictiveness, and sometimes a desire to destroy or injure what one hates.

【Rancor】 stresses bitterness and ill will amounting to malevolence; it often implies the nursing of a grudge or grievance.

【Animus】  suggests less emotional violence than  【animosity】 , but it implies more definitely a prejudice or ill will that seeks to find expression.