What is another word for bang heads?
Pronunciation: [bˈaŋ hˈɛdz] (IPA) 
When it comes to expressing frustration or conflict, there are a plethora of synonyms for the phrase "bang heads." Depending on the context and intensity of the situation, one might use terms such as clash, disagree, argue, debate, contend or even fight. In a more casual setting, someone might say they "butted heads" or "locked horns" with another person. Similarly, in a professional or academic setting, one might describe a difference of opinion as a "disagreement," "dispute," or "conflict." Ultimately, the choice of synonym will depend on the degree of passion or conflict involved and the tone of the conversation.
