"Short forms" is a term used to describe abbreviations, acronyms, or initials that represent longer words or phrases. If you're looking for synonyms to use instead, there are several options. "Abbreviations" is a straightforward choice, as it refers to a shortened form of a word or phrase. "Acronyms" specifically denotes a word formed from the initial letter or letters of a series of words (such as NASA or NATO). "Initialisms" are similar, but each letter is pronounced separately (such as FBI or CEO). "Shortcuts" could also work in some contexts, particularly if referring to quick ways of typing or accessing commonly used phrases.