(ordered by popularity)
rapid
mass
public
free
intestinal
urban
sic
local
colonic
gastrointestinal
slow
safe
upper
lower
quick
cheap
easy
light
conventional
ordinary
isthmian
rail
epididymal
continuous
delayed
non
brief
regional
solar
speedy
oesophageal
improved
swift
ocean
electric
efficient
underground
interoceanic
unimpeded
municipal
interstate
fast
bowel
observed
gastric
segmental
convenient
prolonged
submerged
peaceful
speed
quicker
astronomical
lunar
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