incoming
antisubmarine
demand-dial
eastbound
fixed-wing
high-altitude
high-speed
intercontinental
long-distance
low-yield
medium-range
oncoming
outbound
suborbital
supersonic
transatlantic
twin-engine
unidentified
vehicular
Pound
Sound
abound
aground
around
astound
bound
browned
compound
confound
crowned
downed
drowned
expound
found
frowned
ground
hound
impound
lb
mound
newfound
pound
profound
propound
rebound
redound
renowned
resound
round
sound
surround
ultrasound
unbound
unsound
unwound
wound