When it comes to packet, there are several synonyms that can be used to convey a similar meaning. For example, envelope refers to a paper container used to hold and protect contents. A sachet is a small packet that typically contains a treated material or fragrance, and a pouch is a larger packet that is often used to carry items. A satchel is also a packet but typically refers to a bag with a shoulder strap used for carrying books or other items. Finally, a parcel is a package or packet that is sent through the mail or delivered to someone. All of these synonyms share similar meanings, but each word has its own unique connotations and usage.