Sha384 is a function of cryptographic algorithm Sha-2, evolution of Sha1. It's the same encryption than Sha512, except that the output is truncated at 384 bits. There's also differencies in the initialisation process. This function is part of the U.S Federal Information Processing Standard.
This website allows you to decrypt, if you're lucky, your sha384 hashes and recover the corresponding plaintexts. Our online database contains more than 1.000.000.000 different hashes, and is coming from all wordlist I was able to find on the internet. I then enlarged the wordlist by processing a script of mine to switch characters and add others, in order to obtain a very unique and pertinent database to help you decrypt your hash.