a hard, painful and poisoned swelling under the skin

blister

a swelling or outward curve

swollen object

a round lump, e.g. on a camel's back or (as a deformity) on a person's back

swelling, projection

that part of a layer (of rock etc) which can be seen

projection

something growing out of something else

projection

a bulge or swelling

lump, outgrowth

a kind of small, hard, dry growth on the skin

small growth or lump on the skin