trench (n.)
- abysm
- abyss
- adit
- approach
- aqueduct
- arroyo
- benthos
- bombproof
- bore
- bottom
- bottoms
- breach
- break
- bunker
- burrow
- canal
- canalization
- canyon
- cave
- cavity
- chamfer
- channel
- chap
- chasm
- check
- chimney
- chink
- chisel
- cleft
- col
- concealment
- conduct
- conduit
- countermine
- course
- cover
- covert
- crack
- cranny
- crash
- crevasse
- crevice
- crimp
- cut
- cwm
- dado
- dale
- defile
- dell
- dig
- dike
- dingle
- ditch
- drain
- draw
- dredge
- drill
- drive
- duct
- dugout
- earth
- egress
- entrance
- entrenchment
- excavation
- exit
- fault
- fissure
- flaw
- flume
- flute
- fosse
- foxhole
- fracture
- funnel
- furrow
- gallery
- gap
- gape
- gash
- gill
- glen
- goffer
- gorge
- gouge
- groove
- ground
- grove
- grub
- gulch
- gulf
- gully
- gutter
- ha-ha
- hole
- incision
- ingress
- joint
- kennel
- leak
- lower
- mine
- moat
- notch
- nullah
- open
- opening
- parallel
- pass
- passage
- passageway
- pipe
- pleat
- plow
- quarry
- rabbet
- ravine
- rent
- rifle
- rift
- rime
- rive
- rupture
- rut
- sap
- scissure
- scoop
- score
- scrabble
- scrape
- scratch
- seam
- shelter
- shovel
- sink
- siphon
- slit
- slot
- spade
- split
- streak
- striate
- trespass
- trough
- tunnel
- vale
- valley
- verge
- void
- wadi
- way
- wrinkle
trench (v.)
- approach
- bombproof
- bore
- bottom
- breach
- break
- bunker
- burrow
- canal
- canalize
- carve
- cave
- chamfer
- channel
- channelize
- chap
- check
- chink
- chisel
- cleave
- conduct
- convey
- corrugate
- countermine
- course
- cover
- crack
- crash
- crimp
- cut
- dado
- defile
- delve
- dig
- dike
- ditch
- drain
- draw
- dredge
- drill
- drive
- duct
- earth
- egress
- encroach
- engrave
- entrance
- entrench
- excavate
- exit
- fault
- fissure
- flaw
- flute
- fracture
- funnel
- furrow
- gap
- gape
- gash
- goffer
- gorge
- gouge
- groove
- ground
- grub
- gulf
- gutter
- hole
- impinge
- impose
- incise
- infiltrate
- infringe
- insinuate
- interfere
- interlope
- interpose
- intervene
- intrude
- invade
- irrupt
- joint
- kennel
- leak
- lower
- mine
- notch
- obtrude
- open
- parallel
- pass
- pipe
- pleat
- plow
- quarry
- rabbet
- rent
- rifle
- rift
- rime
- rive
- rupture
- rut
- sap
- scoop
- score
- scrabble
- scrape
- scratch
- seam
- shelter
- shovel
- sink
- siphon
- slit
- slot
- spade
- split
- streak
- striate
- trespass
- tunnel
- verge
- void
- way
- wrinkle
