The first thing that came to my mind when I saw the word "swell" was the swell of the ocean.  But "Swell" has many meanings.  As a noun it means a gradual increase in sound, amount, or intensity, as in the case waves; or, a full or rounded shape.  As a verb, is means to grow larger or rounder.  "Swell" can also be used as an adjective to mean very good or excellent.  And, it means excellently when used as an adverb.

So many options!  How will you photograph "swell" today?