“SURGER” is a valid word. — 7 points Scrabble

surehaving or feeling no doubt or uncertainty; confident and assured
urgean instinctive motive
usera person who makes use of a thing; someone who uses or employs something
rusea deceptive maneuver (especially to avoid capture)
rugsfloor covering consisting of a piece of thick heavy fabric (usually with nap or pile)
regs
errsto make a mistake or be incorrect
grue
suera man who courts a woman
ruesEuropean strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
ergsa cgs unit of work or energy; the work done by a force of one dyne acting over a distance of one centimeter
ruer

usethe act of using
sueFrench writer whose novels described the sordid side of city life (1804-1857)
rugfloor covering consisting of a piece of thick heavy fabric (usually with nap or pile)
rueEuropean strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
reg
errto make a mistake or be incorrect
ser
resa widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells
ers
seg
erga cgs unit of work or energy; the work done by a force of one dyne acting over a distance of one centimeter

usNorth American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
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
esa radioactive transuranic element produced by bombarding plutonium with neutrons

SURGER