Overtype is a term that is commonly used in computing and refers to the practice of replacing or overwriting existing text with new text. There are several synonyms for the word "overtype" that can be used in a variety of contexts, including replace, override, overwrite, substitute, and supplant. Each of these words conveys the idea of replacing something that already exists with something new or different. Some other related terms might include update, modify, revise or edit. When choosing a synonym for overtype, it's important to consider the context in which the word will be used and select the best option that accurately conveys the intended meaning.