Words similar to voluntary

Example sentences for: voluntary

How can you use “voluntary” in a sentence? Here are some example sentences to help you improve your vocabulary:

President Clinton proposed big changes to Social Security . He proposed 1) to devote 62 percent of the federal surplus to shore up Social Security; 2) to invest up to a quarter of the transferred funds in stocks; and 3) to spend another 11 percent of the surplus to set up voluntary 401(k)-style "Universal Savings Accounts."
Screening protocols can be mandatory or voluntary.
Obviously, societal conditions so propitious for encompassing voluntary federations have changed a lot.
Many natural experiments are going on all the time as antibiotics and probiotics are administered and people find all sorts of different ways, voluntary or otherwise, to establish migration links between their gut ecologies.
Representatives from several organizations that relied on voluntary contributions from members emphasized, however, that such funding must be unbiased-that is, used for promoting open and honest information sharing rather than furthering an individual's or organization's stature in the community or for gaining clients.