The term "plain stitch" is commonly used in knitting and crocheting, but there are several other synonyms for this simple stitch. In knitting, it may also be referred to as the "knit stitch" or "stockinette stitch" depending on how it is worked. In crocheting, it can be called the "single crochet stitch" or "double crochet stitch" depending on the style of crochet. Other terms may include "basic stitch" or "foundation stitch." Regardless of the terminology used, the plain stitch is a fundamental building block of many knit and crochet patterns and is essential for creating a smooth, uniform fabric.