When it comes to using the term "apply haphazardly," there are numerous synonyms that can be utilized to convey the same meaning. For instance, the phrase "apply carelessly" can be used to describe actions that are taken without any forethought or planning. "Apply recklessly" is another synonym meaning to act without considering the consequences. "Apply thoughtlessly" indicates a lack of consideration in the manner of execution. Other synonyms for "apply haphazardly" include "apply in a slapdash manner," "apply in a random way," "apply in a disorderly fashion," and "apply in a hit-and-miss manner." All these synonyms point out towards the same idea of an action taken without proper planning and deliberation.