“GIBER” is a valid word. — 8 points Scrabble

berga large mass of ice floating at sea; usually broken off of a polar glacier
brigtwo-masted sailing vessel square-rigged on both masts
briesoft creamy white cheese; milder than Camembert
biera coffin along with its stand
gibean aggressive remark directed at a person like a missile and intended to have a telling effect

bigabove average in size or number or quantity or magnitude or extent
begcall upon in supplication; entreat
riggear (including necessary machinery) for a particular enterprise
ribsupport resembling the rib of an animal
reg
rei
reb`Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their grey Confederate uniforms
gie
irea strong emotion; a feeling that is oriented toward some real or supposed grievance
giba unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
erga cgs unit of work or energy; the work done by a force of one dyne acting over a distance of one centimeter

bea light strong brittle grey toxic bivalent metallic element
era trivalent metallic element of the rare earth group; occurs with yttrium
rea rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
bia heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals

GIBER