There are numerous synonyms for the word "sitor", each carrying its own distinct meaning. One common alternative is "observer", which implies someone who watches or perceives events or situations. Another synonym is "spectator", referring to an individual who simply watches events or performances unfold. "Beholder" is yet another synonym, emphasizing the act of seeing or taking in visual information. "Witness" is a suitable alternative when stressing the role of watching an event, often implying a firsthand account. Lastly, "onlooker" suggests someone who is present at a scene but may not actively engage, much like a bystander. Each synonym serves to capture the different nuances of being a "sitor" or watching from the sidelines.