Ironhandedly, meaning to be strict or rigidly controlling, has various synonyms. One of those synonyms is authoritarian, which refers to a governing style where one person or group holds complete control without taking any input or feedback from other people. Another synonym can be dictatorial, which highlights the emphasis on one person's power and their absolute authority. Domineering is another term that could be used to describe an ironhanded approach, indicating that someone is attempting to take a dominant position in a situation. A further example could be autocratic, reflecting the idea that someone is imposing their will on other people without any room for negotiation or discussion.