adventure
backpack
backpacking
beck
break
brook
caber
creek
ditch
fad
free time
go
going
health
hiking
hobby
knapsack
landscape
leisure
log
nature
peregrinate
peregrinating
recreation
relaxation
rest
river
riveret
rivulet
spare time
sport
stock
stream
streamlet
tree
trekking pole
trunk
walk
walking
wander
wandering