Niels Abel was a renowned Norwegian mathematician who made significant contributions to the field of algebraic functions. When referring to Abel, some synonyms that may be used to describe his work include "pioneering," "innovative," "trailblazing," and "groundbreaking." Additionally, he is often hailed as a "genius," a "prodigy," and a "mathematical luminary" for his immense contributions to the mathematical community. Abel's work has inspired countless mathematicians and served as the foundation for many important mathematical concepts still used today. As such, his name is often synonymous with excellence, brilliance, and a tireless dedication to the pursuit of knowledge.