Plebiscite, a vote by the people of an entire country or district to decide on some issue, such as choice of a ruler or government, option for independence or annexation by another power, or a question of national policy.
verb (used with object), incurred, incurring. 1. to come into or acquire (some consequence, usually undesirable or injurious): to incur a huge number of debts. 2. to become liable or subject to through one's own action; bring or take upon oneself: to incur his displeasure. Origin of incur.
Increment is the unit of measure or the process of increasing. Sometimes there is no difference and they are interchangeable, but 'increment' indicates an increase in regular steps, whereas 'increase' has a wider, more general usage. This means that sometimes only 'increase' is the correct word to use.