The phrase "a workmate" is correct and usable in written English.
It can be used to refer to a colleague or someone you work with, typically in a casual or informal context.
Example: "I often have lunch with a workmate from the marketing department."
Alternatives: "a coworker" or "a colleague."
Currently, he's trying to extract himself from a fling with a workmate, Amy Alison O'Donnelll), who thinks he's Mr Right.
Or maybe a good-humored joke with a workmate like Murray, who helps you keep things in perspective.
I grabbed a Workmate and the rest of my new tools, and headed home for my long-overdue door-modification project.
But as I studied a shelf filled with shiny, expensive blades, I backed into a display for a Workmate portable workbench ($30) and got that instead.
Allan was a bully at school, and his first appearance in court was at the tender age of 15 for knifing a workmate.
In another incident a nurse wanted to leave a health facility because a fellow workmate had given his name to the community after a maternal death occurred in his hands and the husband of the deceased kept threatening him.
She and Sam Worthington play a married couple beset by doubts who spend a night apart during which each is tempted by the prospect of infidelity; he with a glamorous workmate (Eva Mendes), she with an old French flame (Guillaume Canet).
However, a quick survey of my friends, family and workmates revealed a level of insight that I'm not sure I was ready for: Friend 1: "Are you having a laugh?" Workmate 1: "I actually don't believe you.
Another, seemingly from a former workmate, says: "Over the last year you have inspired me beyond words with your practical, positive and humorous approach to this horrible debilitating disease".
(I don't always mean metaphorically: my father remembered a Lancashire workmate asking him which port he caught the boat from when he went home to Fife).
