Mandatory
Part of speech: adjective
Definition: Obligatory; required or commanded by authority. Of, or relating to a mandate.
Example sentence: In 1963, the U.N. Security Council declared a voluntary arms embargo on South Africa. That was extended to a mandatory embargo in 1977. And that was followed by economic sanctions and other measures - sometimes officials, countries, cities, towns - some organized by popular movements.
Compulsory
Part of speech: adjective
Definition: Required; obligatory; mandatoryHaving the power of compulsion; constraining
Part of speech: noun
Definition: Something that is compulsory or required.
Example sentence: Education from six-year-old to 14 is compulsory in Nigeria, but the simple fact is that a lack of resources, coupled with peoples' inability to afford books and uniforms mean the reality for millions of Nigerian children is a life without education.