The word "watch" is already in its full form, it's not an abbreviation, acronym or shortened version of anything else.
The word "watch" actually comes from an Old English word: wæccan, which means to "keep a look out, or remain vigilant".
But perhaps you're looking for an acronym that WATCH could stand for?
If that’s the case you can find lots of them - it seems to be a word that lends itself to being used in this way!
If you live in Washington, or are employed in the Water industry, or maybe are a Woman, even if you want to talk about the whole World - you can deploy the 5 letters w.a.t.c.h in whatever way is best for your business or interests.
Here are a few
WATCH Washington Access To Criminal History
WATCH Water and Air Team for CHarlevoix
WATCH Women Act To Control Healthcare
WATCH World Alliance of Television for Children’s Health
I’m sure there are more - people can be very inventive and funny when using language.
One of my favourite acronyms is used in the James Bond film Thunderball.SPECTRE is the villainous organisation determined to rule the world. The letters stand for
SPecial Executive for Counterintelligence, Terrorism, Revenge and Extortion
I wonder who thought of that great acronym?
And of course ......the word WATCH without it’s letters being separated can be used to mean ‘to observe something‘ or ‘a small timepiece worn on the wrist’ It’s also used to describe ‘a period of time time when on guard duty.'