Haplography refers to the act of omitting a repeated letter or syllable in a word. Some synonyms for haplography include single writing, single lettering, loss of letter duplication, and reduction of letters. Other similar terms include homophony, which refers to words that have the same pronunciation but different spellings, and homography, which refers to words that have the same spelling but different meanings. Haplography is a common error in writing, especially when a writer is typing quickly or not paying attention to their work. To avoid haplography, it is important to carefully proofread your writing and pay close attention to spelling and grammar.