There are several synonyms for the phrase "fail to recall" that one can use in order to make their writing more varied and interesting. Some of these synonyms include "forget," "fail to remember," "be unable to recollect," "lose one's memory of," "draw a blank," and "be unable to retrieve." Each of these phrases can be used in different contexts to convey a slightly different meaning, but they all ultimately serve the same purpose of describing a person's inability to remember something. By using a variety of synonyms for "fail to recall," one can avoid repetition and keep their writing fresh and engaging.