(ordered by popularity)
same
narrow
right
free
critical
straight
mean
shortest
spiritual
direct
only
steep
circular
true
middle
clear
wrong
optical
current
closed
correct
curved
optimal
easy
downward
difficult
foot
broad
wide
alternative
rocky
rough
upward
longest
continuous
evolutionary
tortuous
smooth
dangerous
worn
primrose
unique
eightfold
bridle
trodden
forward
paved
thorny
rugged
noble
safe
spiral
developmental
familiar
linear
shorter
light
circuitous
apparent
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