moderator

As nouns the difference between moderator and member

is that moderator is moderator (mediator, chairman, web forum administrator) while member is member (person).

As nouns the difference between moderator and cause

is that moderator is someone who moderates while cause is the source of, or reason for, an event or action; that which produces or effects a result.

As a verb cause is

to set off an event or action.

As nouns the difference between moderator and operator

is that moderator is someone who moderates while operator is one who operates.

As nouns the difference between moderator and chairman

is that moderator is someone who moderates while chairman is a person (implied male) presiding over a meeting.

As nouns the difference between moderator and umpire

is that moderator is someone who moderates while umpire is the official who presides over a tennis game sat on a high chair.

As a verb umpire is

to act as an umpire in a game.

As a noun moderator is

moderator (mediator, chairman, web forum administrator).

Moderator is a related term of reviewer.

As nouns the difference between moderator and reviewer

is that moderator is moderator (mediator, chairman, web forum administrator) while reviewer is a person who writes critical reviews for a newspaper or other publication; a critic.