aeronautics
air service
airline
astronautics
aviation
ballooning
blind flying
boating
canoeing
circumnavigation
cloud-seeding
coasting
commercial aviation
contact flying
cruising
flight
flow
flowing
flying
general aviation
glide
gliding
gunkholing
motorboating
navigability
navigating
navigation
passage-making
periplus
pilotage
rowing
sailplaning
sculling
sea travel
seafaring
seamanship
skating
skiing
skim
sledding
slide
sliding
slipping
slither
slithering
soaring
steaming
sweep
departure
going
going away
leaving
ailing
assailing
bailing
baling
curtailing
derailing
detailing
emailing
entailing
failing
flailing
grayling
hailing
impaling
inhaling
jailing
mailing
nailing
prevailing
railing
regaling
scaling
surveilling
tailing
trailing
unavailing
unfailing
unveiling
veiling
wailing
whaling