protuberate

As verbs the difference between protrude and protuberate

is that protrude is to extend from, above or beyond a surface or boundary; to bulge outward; to stick out while protuberate is to bulge outward, producing a rounded protuberance.

Protuberate is a related term of protuberant.

As an adjective protuberant

is swelling or bulging outward.

As a verb protuberate is

to bulge outward, producing a rounded protuberance.

As a noun protuberance

is a bulge, knob, swelling, spine or anything that protrudes.

As a verb protuberate is

to bulge outward, producing a rounded protuberance.

In intransitive terms the difference between bulge and protuberate

is that bulge is to bilge, as a ship; to founder while protuberate is to bulge outward, producing a rounded protuberance.

As a noun bulge

is something sticking out from a surface; a swelling, protuberant part; a bending outward, especially when caused by pressure.