"Head at pass" is an idiomatic expression that means to have control or authority over a situation or decision making. Some synonyms for "heads at pass" would be "in charge," "leading the way," "at the helm," "in the driver's seat," "in control," "calling the shots," "in command," "running the show," and "holding the reins." All of these synonyms convey the idea that an individual or group is the one with the power and responsibility to make important decisions and guide a situation to its intended outcome. Using any of these terms in place of "head at pass" can help to add variety to a piece of writing or conversation while still conveying the same meaning.