Onlooker vs. Spectator — What's the Difference?

One that looks on; a spectator or bystander.

An observer of an event, especially a sports contest.

A spectator; someone looks on or watches, without becoming involved or participating.

One who watches an event; especially, an event held outdoors.

Someone who looks on

One who on; one who sees or beholds; a beholder; one who is personally present at, and sees, any exhibition; as, the spectators at a show.

A close observer; someone who looks at something (such as an exhibition of some kind);

A woman's pump with medium heel; usually in contrasting colors for toe and heel