Lighthouse
Part of speech: noun
Definition: A building, usually a tower, containing a light to warn or guide ships.
Example sentence: Israel is a lighthouse and the only democracy in a dark and tyrannical region. It's part of us, of our European identity.
Beacon
Part of speech: verb
Definition: To act as a beacon.
Part of speech: noun
Definition: A signal fire to notify of the approach of an enemy, or to give any notice, commonly of warning or guiding.A signal or conspicuous mark erected on an eminence near the shore, or moored in shoal water, as a guide to mariners.A high hill or other easily distinguishable object near the shore which can serve as guidance for seafarers.That which gives notice of danger.
Example sentence: Free nations of the world cannot allow Taiwan, a beacon of democracy, to be subdued by an authoritarian China.