Synonyms of marathon

Noun

1. marathon, endurance contest, undertaking, project, task, labor

usage: any long and arduous undertaking

2. marathon, footrace, foot race, run

usage: a footrace of 26 miles 385 yards

3. Marathon, battle of Marathon

usage: a battle in 490 BC in which the Athenians and their allies defeated the Persians

Definition and meaning of marathon (Dictionary)