Security
Part of speech: noun
Definition: the condition of not being threatened, especially physically, psychologically, emotionally, or financially something that secures. an organization or department responsible for providing security by enforcing laws, rules, and regulations as well as maintaining order. something that secures the fulfillment of an obligation or law. Freedom from apprehension. proof of ownership of stocks, bonds or other investment instruments.W property temporarily relinquished to guarantee repayment of a loan
Example sentence: The ignorance of one voter in a democracy impairs the security of all.
Certificate
Part of speech: noun
Definition: A document containing a certified statement.A document evidencing ownership or debt.The information needed in order to verify a positive answer to a problem.
Example sentence: I'm trained as a teacher; that's the only thing I've got a certificate for.