protrusion
Something sticking out
Protrusion is something that sticks out from a surface or extends beyond its surroundings.
A knob, a bump, a jutting rock—anything that projects outward is a protrusion: The protrusion on the wall turned out to be an old nail.
The word also names the act of protruding: the protrusion of his lower lip when he pouted.
Slight collision or protrusion
- lumpShapeless solid mass
- knobRounded gripping fixture
- bulgeOutward curved projection
- swellIncrease in size
hump · mound · boss · dome · blister · bubble · pouch · belly
Organ breaching muscle wall
- aneurysmArterial wall bulge
- tumorAbnormal tissue mass
- cystFluid-filled tissue sac
- noduleRounded small lump
swelling · edema · bulge · abscess · boil · welt · papule · blister
Surfacing native stone
- cragSteep rugged outcrop
- ledgeProjecting horizontal surface
- overhangSection projecting beyond support
- escarpmentSteep slope dividing elevations
precipice · cliff · ridge · spur · peak · bluff · promontory · headland
Slight collision or protrusion
- lumpShapeless solid mass
- knobRounded gripping fixture
- nodeConnection point in networks
- bossWorkplace superior
nub · prominence · process · tubercle · condyle · spine · horn · snout
bump
Slight collision or protrusion
swell · hump · mound · boss · dome · blister · bubble · pouch · belly · paunch
hernia
Organ breaching muscle wall
nodule · swelling · edema · bulge · abscess · boil · welt · papule · blister · bunion
outcrop
Surfacing native stone
escarpment · precipice · cliff · ridge · spur · peak · bluff · promontory · headland · tor
bump
Slight collision or protrusion
boss · nub · prominence · process · tubercle · condyle · spine · horn · snout · beak
cantilever
Beam supported one end
shelf · overhang · balcony · eave · cornice · strut · arm · extension · flange · fin
bud
Unopened plant growth
spine · tendril · branch · twig · node · knot · burl · gall · root · tuber
protrusionindentation
Inward cut or setback
cavity · depression · recess · concavity · hollow