opponent /ə-pōˈnənt/

1. The person opposed to one in a contest, struggle, battle, etc
2. Someone who opposes a course of action, belief, etc
3. An opponent muscle (anatomy)

1. Opposing
2. Antagonistic (with to; formerly with with)
3. Placed opposite or in front
4. (of a muscle) opposing one part (eg a digit) to another (anatomy)

oppoˈnency noun

• irreprehensible
• irreprehensibleness
• irreprehensibly
• irrepressibility
• irrepressible
• irrepressibleness
• irrepressibly
• irreproachability
• irreproachable
• irreproachableness
• irreproachably
• irreproducible
• irreprovable
• irreprovableness
• irreprovably
• irresistance
• irresistances
• irresistibilities
• irresistibility
• irresistible
• irresistibleness
• irresistibly
• irresolubilities
• irresolubility
• irresoluble