an·tag·o·nism 
(ăn-tăgə-nĭz′əm)
(ăn-tăgə-nĭz′əm)n.
1. Hostility that results in active resistance, opposition, or contentiousness. See Synonyms at enmity.
2. The condition of being an opposing principle, force, or factor: the inherent antagonism of capitalism and socialism.
3. Biochemistry Interference in the physiological action of a chemical substance by another having a similar structure.
- incommunicado
- incommunicative
- incommunicatively
- incommutability
- incommutable
- incommutableness
- incommutably
- incomparability
- incomparable
- incomparableness
- incomparably
- incompatibility
- incompatible
- incompatibleness
- incompatibly
- incompetence
- incompetency
- incompetent
- incompetently
- incomplete
- incomplete abortion
- incomplete dominance
- incomplete flower
- incomplete fracture
- incompletely