Blue collar worker is a term that is commonly used to refer to someone employed in manual labour or skilled trades. However, there are a number of synonyms that can be used to describe workers in similar roles. These might include terms like tradesperson, labourer, technician, mechanic, or craftsman. Each of these terms conveys a slightly different image of the worker in question, with some focusing more on specific skills or trades, while others may have broader connotations. Ultimately, the choice of which term to use may depend on the specific industry or field in question, as well as the particular tasks or responsibilities associated with the job.