Berlin wall
Pillars of Hercules
abut
accord
adjoin
advance
advancement
advancing
airing
ambit
amble
anabasis
arena
around
backpack
bailiwick
bamboo curtain
be getting along
beat
beef
befringe
bind
bitch
boggle
border
border ground
border line
borderland
bound
boundary
boundary condition
boundary line
bourn
bow out
boycott
break boundary
breakoff point
butt
buzz off
call in question
career
ceiling
challenge
check
circle
circuit
circumscription
clasp
district
dominion
forward motion
gregorian calendar month
master's degree
onward motion
procession
progress
progression
territorial dominion
territory
walk
marched
marches
marching
assault
battle
course
drive
flight
journey
move
movement
passage
pursuit
retreat
road
train
travel
troop
arch
demarche
larch
parch
starch