"Put in a nutshell" is a common phrase used to summarize something briefly and concisely. If you're looking for synonyms for this phrase, some options include "summarize," "condense," "abbreviate," "boil down," "recapitulate," and "simplify." Other related phrases that convey a similar idea include "get to the point," "cut to the chase," and "make it brief." Using these types of phrases can help you communicate clearly and efficiently when you need to convey important information quickly. Regardless of the specific wording you choose, the key is to ensure that your message is clear, concise, and straightforward.