Legal
Part of speech: adjective
Definition: Relating to the law or to lawyers, as in legal profession. Something which has a basis in the law, such as legal precedent. Something which is allowed or prescribed by law, such as a legal motion.
Example sentence: Collecting more taxes than is absolutely necessary is legalized robbery.
Eligible
Part of speech: adjective
Definition: suitable; meeting the conditions; worthy of being chosen
Example sentence: I do believe Hong Kong's 5 million eligible voters want the chance to elect their chief executive.