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

• acidifier
• acidifiers
• acidifies
• acidify
• acidifying
• acidimeter
• acidimeters
• acidimetries
• acidimetry
• acidities
• acidity
• acid jazz
• acidly
• acidness
• acidnesses
• acidophil
• acidophilic
• acidophils
• acidophilus
• acidophiluses
• acidoses
• acidosis
• acid rain
• acid reflux
• acid rock