Navicert is a term that refers to a certificate issued to a ship owner or a cargo owner, indicating the nationality of the vessel and the character of the goods. However, there are different words that can be used as synonyms for the word navicert. One of them is "shipping certificate," which is a document that verifies that a shipment has been transported to a specific location by a shipping company. Another synonym for navicert is "bill of lading," which is a legal document that details the goods being shipped and the terms of the agreement between the buyer and the seller. Lastly, "maritime document" can also be used as a synonym for navicert, which refers to any document related to shipping or maritime commerce.