BACKRONYM

PRONUNCIATION: (BAK-ro-nim)

MEANING: noun: A word re-interpreted as an acronym.

ETYMOLOGY: A blend of back + acronym. Earliest documented use: 1983.

NOTES: In a backronym, an expansion is invented to treat an existing word as an acronym. For example, some believe that the word NEWS is an acronym for North, East, West, and South. In reality, the word is coined from “new” as in: What’s new?
When naming something, sometimes a suitable name is chosen and then an acronym is retrofitted on top of it: USA PATRIOT Act (Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism). The clunkiness of the expansion is a quick giveaway. How about forming a backronym for ACRONYM itself: A Contrived Result Of Nomenclature Yielding Mechanism?
Often, backronyms serve a useful purpose as mnemonics. For example, see Apgar score.
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HACKRONYM - Highly Appreciated Child Keeps Repairing Or Negating Your Mistakes

BACHRONYM - Hofstadter's Contracrostipunctus Acrostically Backwards Spells "JSBACH"

MACKRONYM - an extraordinarily large name, like "Chargoggagoggmanchauggagoggchaubunagungamaugg"
(That's "Webster Lake" to you. YCLIU)