An abbreviation formed by the beginning letters or syllables of other words (as "Benelux").
An abbreviation formed by the initial letters of other words, sometimes exclusively such abbreviations when pronounced as a word (as "laser") rather than as individual letters (initialisms such as "TNT").
To form into an acronym.
An abbreviation of a person's name, constructed by taking the initial letters of first, last, and sometimes middle name(s). See monogram