The word "pissed" is a slang term that refers to a state of anger or annoyance. There are a plethora of synonyms that can be used to describe this feeling, ranging from mild to severe. Mild synonyms include "irritated," "annoyed," and "bothered," while stronger ones include "enraged," "furious," and "livid." Other synonyms that can be used include "infuriated," "exasperated," "incensed," "outraged," "irked," "displeased," and "upset." It is important to note that the severity of the synonym used may differ from person to person, and context may also play a role in which synonym is most appropriate to use.