Question

Turn the following verbs into nouns denoting the doer of the action.
To support;
to vote;
to manufacture;
to own;
to oppose;
to believe;
to elect;
to win;
to defend;
to direct;
to represent;
to preside.

Answer 1

supporter
voter
manufacturer
owner
oppositionist (или opposer)
believer
elector
winner
defender
director
representative
president

Answer 2

to support - supporter
to vote - voter
to manufacture - manufacturer 
to own - owner
to oppose - oppositionist
to believe - believer
to elect - elector
to win - winner
to defend - defender
to direct - director
to represent - representative 
to preside - president