Free
Free adjective - Not being under the rule or control of another.
Non-mandatory and free are semantically related. In some cases you can use "Non-mandatory" instead an adjective "Free".
Non-mandatory
Free and non-mandatory are semantically related. You can use "Free" instead an adjective phrase "Non-mandatory".
Cite this Source
Non-mandatory and Free. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/free/non-mandatory
Free & Non-mandatory. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/free/non-mandatory>.
Non-mandatory or Free. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/free/non-mandatory.