When it comes to describing an action performed without caution or thoughtfulness, the word "uncarefully" can be substituted with an array of synonyms. Some suitable alternatives include recklessly, thoughtlessly, negligently, haphazardly, carelessly, inattentively, heedlessly, sloppily, casually, hastily, and slapdash. These words encapsulate the notion of acting without proper attention or mindfulness. Whether referring to a person's behavior or the execution of a task, these synonyms highlight the absence of carefulness and emphasize the potential consequences that may arise from neglect or lack of consideration. Exploring various synonyms can enrich our vocabulary and help us express a wider range of meanings in our writing and conversations.