What is the correct word for "acronymed"?

Solution 1:

To make something shorter by writing it with just a few of its letters is to contract it. Blvd is the shortened, abbreviated, or contracted, form of boulevard.

When you abbreviate a long name or term using just its initials, you're making an abbreviation. Eg. the USA is an abbreviated way of saying the United States of America.

When such an abbreviation can be pronounced like a word, it's called an acronym. Eg. the United Nations Children's Fund is abbreviated to UNICEF, which can be pronounced like a word when speaking. So UNICEF is an acronym.