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
chieftress
day
figurin
greatcontent
guesswork
harrying
jawing
nightscape
orderings
pragmatists
prat
proofing
question
reverse-osmosis
say'
spadework
steeping
sunniness
tootle
toshow
wonk