Lowbred is often regarded as a derogatory term, and it's helpful to know some synonyms to convey the same idea in a different way. Some synonyms for lowbred include boorish, uncouth, crass, unrefined, vulgar, tasteless, crude, and ill-bred. These synonyms imply a lack of sophistication, refinement, and manners. They are often used to describe someone who is socially awkward, lacking in grace, tact, or social skills. While these synonyms mean essentially the same thing, they differ in their degree of harshness and formality. Some may be more appropriate for formal writing, while others are more informal and conversational.