fast
PDQ
air line
all at once
all together
apace
at a blow
at a stroke
at once
at one blow
at one jump
at one stroke
at one swoop
at one time
away
axis
beeline
chord
decisively
diagonal
diameter
direct
direct line
directly
directrix
edge
expeditiously
first
forthwith
great-circle course
immediate
immediately
in a hurry
in no time
instanter
instantly
irreversible
normal
now
on the instant
on the spot
one-way
per saltum
perpendicular
pretty damned quick
promptly
pronto
quickly
radius
radius vector
right away
100-yard
Christiania
runout
skimmers
ten-mile
waddling