The word sea is often used in sentences to refer to the expanse of saltwater that separates continents and is home to a variety of marine life. It can also denote a region or particular part of these waters, as in the 'Baltic Sea' or the 'North Sea.' Additionally, sea can be used metaphorically in phrases like 'a sea of emotions,' to describe an overwhelming amount, or in the context of maritime activities.

The word see is commonly used when talking about the act of perceiving with the eyes. It can describe observing something visually, either directly or through devices like binoculars or telescopes. Additionally, see can refer to understanding something conceptually or to visit and spend time with someone. Its usage extends to various idiomatic expressions that convey different nuances of observation or realization.

To sum up, sea is a noun that refers to the large area of saltwater, while see is a verb associated with vision and comprehension. Although they sound identical, their meanings and applications are entirely distinct. Sea typically refers to geographical features and marine environments, while see is used to express the act of perceiving through sight or insight. Homophones like sea and see show the intricate nature of the English language, where context is key to understanding meaning.