The phrase "spoken of" can be replaced with a variety of synonyms depending on the context. Some options are "mentioned," "discussed," "talked about," "referred to," "alluded to," "brought up," "commented on," "noted," "cited," and "remarked upon." These synonyms often convey a similar meaning of something being mentioned or discussed in speech or writing. Choosing the appropriate synonym will depend on the tone and formality of the context, as well as the writer's or speaker's intent. Overall, having a rich vocabulary of synonyms allows for more precise and engaging communication.