"Stay" is a word that means to remain in a place or a condition for a certain period of time. There are several synonyms for "stay" that can be used in different contexts. For example, "linger" is a good alternative when you want to describe something staying in the same spot for a longer time than expected. "Reside" is another synonym for "stay" that is often used when describing where someone lives. "Remain," "continue," and "endure" are other words that can be used as synonyms for "stay" in appropriate contexts. In many cases, the choice of synonym depends on the tone, context, and intended meaning of the sentence.