They are distinguished from ''acronyms'' in that initialisms are pronounced as individual letters, while acronyms are pronounced as if the letters spelled out a word (which they may in some cases do).
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They are distinguished from ''acronyms'' in that initialisms are pronounced as individual letters, while acronyms are pronounced as if the letters spelled out a word (which they may in some cases do). (The use of the word "acronym" to include initialisms as well as acronyms is imprecise, but increasingly accepted).