a rounded swelling which distorts an otherwise flat surface.
the telltale bulge of a concealed weapon
swell or protrude to an incongruous extent.
the veins in his neck bulged
swell,swell out,puff up/out,stick out,balloon,balloon up/out,fill out,bag,belly,project,protrude,jut (out),stand out,be prominent,expand,inflate,distend,dilate,enlarge,bloat,intumesce,tumefy