Freeware is a term used to describe software that is free to use. However, it is not the only term used to describe software that is free of charge. There are several synonyms for the word "freeware," including open-source software, shareware, and public domain software. Open-source software is free to use, and its source code is available for anyone to download and modify. Shareware is software that can be used for free for a trial period, after which the user will be required to pay. Public domain software is software that has been released to the public without any restrictions. All of these terms refer to software that is free to use, but with different implications regarding copyright and user rights.