An ACRONYM means the initials of a group of Words to form a Word:
- LASER is the acronym for LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION.
- NASA is the acronym for NATIONAL AERONAUTICS AND SPACE ADMINISTRATION.
- SNAFU stands for Situation Normal All Fouled Up
An ABBREVATION means that it's a short form of a Word:
- Mr. for Mister
- Ave. for Avenue
- tsp. for teaspoon