Observers are people who watch and take note of something. Noters (6 letters) are people who take notes on what they observe, Eyers (5 letters) are people who look at something with great attention, Eyes (4 letters) are people who look at something with the intention of noticing details, and WATCHERS (8 letters) are people who keep an eye on something for a period of time. All of these terms can be used to describe someone who is observing something.