There are several synonyms for the word "basic detail" that can be used to describe fundamental or essential information. One alternative could be "fundamental information", which highlights the key aspects of a topic. Another synonym could be "essential details", which emphasizes the crucial pieces of information necessary for understanding a concept. "Primary particulars" is another phrase that can be used when referring to core aspects of a subject matter. Other options include "foundational elements", "fundamental factors", "key points", or "core features". Ultimately, the key is to identify the most important pieces of information and choose a synonym that best encapsulates their significance.