* WC: This could work if you're specifically referring to the connection between words in a sentence or text.
* W.C.: This adds a little more formality to the abbreviation.
* W/C: This is a more informal option, using a slash to represent "with."
It's important to note that these abbreviations are not standard and may not be universally understood. If you're using them, it's best to define them clearly the first time you use them.
Instead of an abbreviation, you might also consider using these alternatives:
* Word linkage
* Word relationship
* Lexical connection
Ultimately, the best option depends on the specific context and your intended audience.