The phrase "basic component" can be substituted with a variety of synonyms, depending on the context in which it is used. For instance, one could use the term "elementary component" to imply a simple part that is essential to a larger system or structure. "Fundamental component" also conveys a similar meaning, suggesting that the component in question is something that is absolutely necessary. Other synonyms for "basic component" might include "foundational part," "core element," "primitive unit," or "primary building block." Ultimately, the choice of synonym depends on the intended meaning and the writer's personal style.