Word Study
legwork
OXFORD DICTIONARY
legwork, n. work which involves a lot of walking, travelling, or physical activity.
THESAURUS
legwork
amassing evidence, ambling, ambulation, backpacking, close inquiry, department of investigation, detection, detective work, exhaustive study, footing, footing it, footwork, going on foot, hearing, hiking, hitchhiking, hitching, hoofing, indagation, investigation, investigative bureau, legislative investigation, lumbering, marching, pedestrianism, perambulation, perscrutation, probe, research, sauntering, sifting, sleuthing, staggering, strolling, thumbing, thumbing a ride, toddling, tottering, tramping, treading, trudging, waddling, walking, witch-huntFor further exploring for "legwork" in Webster Dictionary Online