The term "sub tends" refers to the idea of something being a subset or a smaller part of a larger whole. There are several synonyms that can be used to describe this concept, such as "subordinate," "secondary," "auxiliary," "supporting," "inferior," and "lesser." Each of these words is useful in different contexts and can help to convey slightly different meanings. For example, "subordinate" suggests a clear hierarchy or order of importance, while "supporting" might imply a more collaborative or equal relationship. Regardless of which synonym is used, the idea of something sub tending to a larger whole is an important concept to understand in many areas of life, from science to business to social relationships.