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-hunt
