There are several synonyms for the term "Gell-Mann," which is a surname belonging to a Nobel Prize-winning physicist. Some possible alternatives might include "physicist," "scientist," or even "Gell-Mann's Law," which refers to the observation that complex systems often appear simple at a high level of abstraction. Other related terms might include "quantum mechanics," "particle physics," or "elementary particles," all of which are areas of study that Gell-Mann was noted for. Additionally, you might use terms like "standard model," "strong force," or "quark theory" to describe some of Gell-Mann's most significant contributions to the field of physics.