What is a short way to write word?

There isn't a single universally accepted "short way" to write "word" that's universally understood.

However, depending on the context, here are some options:

* Abbreviation: "wd"

* Symbol: There's no standard symbol for "word".

* Phonetic spelling: "wrd"

* Initialism: "W"

The best way to shorten "word" depends on the specific situation and your audience.