sea / see / si [si:]
sea – n. – 1. oceans, the continuous body of salt water that covers the greater part of the earth's surface; 2. a large lake or landlocked body of water, whether salt or fresh
see – n. & v. – n. – 1. a position of dignity or authority; 2. to 'have a look' at something; v. – 1. perceive with the eyes; 2. behold in imagination, visions or dreams; 3. understand
si – n. – in the action or practice of singing to the sol-fa syllables; solmization, the seventh note of the scale