There are several synonyms for the phrase "fail to recollect." Some of the common ones include forget, overlook, neglect, and omit. When we forget something, we unintentionally fail to remember it. We overlook things when we fail to notice them. Neglect is a situation where we fail to give enough attention or care, causing something to be forgotten. Whereas omit is when we intentionally leave something out or fail to include it. All these phrases are generally used when we fail to remember something, and they may vary depending on the context and the situation. It is important to familiarize yourself with different synonyms as it enables you to choose the right phrase to express your thoughts.