When looking for synonyms for the phrase "nothing to speak of," there are a few options to choose from. Some of the most common synonyms include "negligible," "insignificant," "inconsequential," "unremarkable," and "trivial." Each of these words indicates that something does not warrant much attention or discussion. "Negligible" and "insignificant" suggest that something is so small or unimportant that it can be ignored entirely, while "inconsequential" implies that something has little impact or relevance. "Unremarkable" and "trivial" suggest that something is not interesting or noteworthy in any way. Overall, these synonyms are useful for describing something that is not worth talking about in great detail.