Another term for weld fault is:

The term used to describe a weld fault is "defect." In welding, a defect is an imperfection that occurs in the weld or in the base material that compromises the quality and integrity of the weld. These defects can arise from various issues during the welding process, including improper technique, contamination, or material defects. Identifying and addressing defects is crucial to ensuring structural integrity and safety in welded structures.

While other terms like "discontinuity," "flaw," and "error" are related to the quality of welding, they do not directly equate to the specific concept of a defect. Discontinuities refer to any interruption in the physical continuity of a material, which may not necessarily impact function, while flaws and errors might suggest varying degrees of issues but do not specifically define the severity and consequence associated with defects in welding practice. Understanding these distinctions is critical in assessing the quality of welds and ensuring compliance with industry standards.