C, c is a letter in the English alphabet, and it also has a variety of synonyms that can be used to describe it. Some synonyms for the letter C include "cee," "kay," and "sea." These synonyms for the letter C can be useful in a variety of contexts, such as spelling out a name or word over the phone, or in crossword puzzles where you may need to come up with an alternative word for a clue that begins with the letter C. Other synonyms for the letter C may include words like "curved," "rounded," or "circled," as these words describe the shape of the letter.