What is the abbreviation for word contractor?

There isn't a widely accepted abbreviation for "contractor."

However, depending on the context, you might see abbreviations like:

* C. (for "Contractor" or "Company")

* Ctr. (for "Contractor")

* Cont. (for "Contractor" or "Contract")

It's important to note that these abbreviations are not standard and their meaning might be ambiguous.

It's generally best to spell out "contractor" unless there's a clear understanding of the context and the abbreviation is used consistently.