What is another word for nonobligatory?
Pronunciation: [nˌɒnəblˈɪɡətəɹˌi] (IPA) 
Nonobligatory refers to something that is not mandatory, essential or required. There are several synonyms for nonobligatory, including optional, discretionary, voluntary, elective, and non-mandatory. These terms describe things that are not necessary, but can be chosen or selected if desired. Optional refers to something that is left to choice or one's discretion. Discretionary is something that can be decided or chosen freely, available as a choice. Voluntary pertains to something that is done willingly or out of one's own choice. Elective is something that is chosen or selected out of a range of options. Non-mandatory describes something that is not required or essential. All of these words serve as substitutes for nonobligatory, depending on the context of the sentence.
