After due consideration is a phrase commonly used to signify thorough thought and contemplation of a matter. However, it's not the only way to express such sentiments. There are several synonyms for this phrase, including "weighed carefully," "thoughtfully examined," and "deliberated upon." Other alternatives include "given careful thought," "carefully reviewed," "considered extensively," and "meticulously pondered." All these synonyms are great alternatives that can add depth and gravitas to your writing or speech. They can be used interchangeably depending on the context, but they all convey the same message - that careful thought and contemplation have been given to a matter.