1. (noun) an overwhelming manifestation of some emotion or phenomenon

• manifestation

2. (noun) an unusual (and often destructive) rise of water along the seashore caused by a storm or a combination of wind and high tide

• calamity
• cataclysm
• catastrophe
• disaster
• tragedy
• moving ridge
• wave

3. (noun) a wave resulting from the periodic flow of the tides that is caused by the gravitational attraction of the moon and sun

• moving ridge
• wave