The word "corniest" typically refers to something or someone that is excessively sentimental or outdated, often in a way that seems cheesy or lacking in sophistication. Some synonyms for this word include "cheesy," "cliche," "hackneyed," "banal," "hokey," "trite," "overdone," and "unoriginal." These words all express similar ideas of something being old-fashioned or too sentimental to be appreciated by modern audiences. While these words may have negative connotations, they can also be used affectionately to describe something that is endearingly nostalgic or charmingly simple. Overall, these synonyms help to capture the essence of what makes something "corny" and why it might be seen as less than cool or fashionable.