colleague, associate, teammate
proponent, supporter, backer (of an idea)
opponent
opposite of yellow, according to opponent-process theory
Opponent
Someone who has opposite political views than you and may debate them with you, or belong to another party than you or may be your opponent in an election.
The opposite in character, or a hero's opponent, is a villain.(e.g. in Peter Pan, Peter is the hero and Captain Hook is the villain)*(The opposite gender of a hero is a heroine.)
Pulling down on your opponent's wrist while pushing his or her opposite shoulder
It's when your sparring and you and your opponent are facing opposite directions. (Tae Kwon Doe)
if we kick football it is an action the opposite reaction is the opponent of the team's action
White is the opposite of black. (except in checkers, where the opponent is red)In additive terms, black is all colors, white is no color. In light, black (dark) is the absence of light.
If it's during a serve and it lands on the opposite playing surface then serve over, otherwise it is a point for the opponent. If it's during play, it must land on the opposite playing surface or it's a point for the opponent. If it does land on the opposite playing surface it is still in play.
1. This is because every creator has opponent/opposite. 2. God designated it to be like that
Some examples are: enemy, adversary, antagonist, arch-enemy, assailant, bitter enemy, combatant, devil, open enemy, opponent, opposing party, opposite camp, public enemy, sworn enemy