"Wound up" is a colloquial expression that can have multiple meanings, including being tense, nervous, or angry. It can also refer to being mentally or physically fatigued or exhausted. There are various synonyms for "wound up" that can be used based on the context. For example, for "being tense," one could use "nervous," "anxious," or "edgy." For "being angry," "irritated," "frustrated," or "fuming" can be used. Similarly, for "being mentally or physically fatigued," "exhausted," "drained," or "burned out" can be utilized. Choosing the appropriate synonym for "wound up" can enhance the expression's accuracy and effectiveness in communication.