There are many synonyms for the word "race-track" that one can use in order to enhance their writing or speech and avoid repetition. One common synonym is "speedway," which refers to a track used for high-speed racing. Another synonym is "course," which is a general term for any track used for competitive running, cycling, or equestrian events. "Circuit" is also another synonym that refers to a closed track designed for car or motorcycle racing. Other synonyms include "track and field," "running track," or "stadium," depending on the context and usage. These synonyms provide a versatile vocabulary for writers and speakers alike to improve their communication and expressiveness.