The term "doest thing" can have a range of synonyms, depending on the context in which it is used. For example, if used to refer to a specific object or task, it may be interchangeable with words such as "action," "task," or "job." On the other hand, if used more broadly to refer to someone's overall behavior, it could be replaced with alternatives such as "conduct," "behavior," or "demeanor." Additionally, the term could be interpreted as meaning an individual's most important or defining quality, in which case it could be replaced with terms like "virtue," "uniqueness," or "talent." Regardless of its specific meaning, there are many options for synonyms that can help to convey a similar idea.