Synonyms for antagonist

Noun

1. adversary, antagonist, opponent, opposer, resister, person, individual, someone, somebody, mortal, human, soul

usage: someone who offers opposition

2. antagonist, antagonistic muscle

usage: a muscle that relaxes while another contracts; "when bending the elbow the triceps are the antagonist"

3. antagonist, drug

usage: a drug that neutralizes or counteracts the effects of another drug