Either is a common word that is used in different contexts. It refers to one of the two options that are presented. However, there are a variety of synonyms that can be used in lieu of either to add diversity to your writing. Some possible synonyms for the word either include 'any one of', 'one or the other', 'neither one', 'whether', 'whichever', 'both', 'every', 'each', and 'any'. It's essential to use synonyms to convey a better meaning to your readers as overusing the same word can make your writing monotonous. Therefore, utilizing synonyms for either is a good way to make your writing more interesting and engaging.