“SULKER” is a valid word. — 10 points Scrabble

surehaving or feeling no doubt or uncertainty; confident and assured
rulea principle or condition that customarily governs behavior
lurequalities that attract by seeming to promise some kind of reward
usera person who makes use of a thing; someone who uses or employs something
rusea deceptive maneuver (especially to avoid capture)
sulka mood or display of sullen aloofness or withdrawal
lurklie in wait, lie in ambush, behave in a sneaky and secretive manner
ruskslice of sweet raised bread baked again until it is brown and hard and crisp
slur(music) a curved line spanning notes that are to be played legato
elkslarge northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America
slueturn sharply; change direction abruptly
suera man who courts a woman
ruesEuropean strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
ukesa small guitar having four strings
leksthe basic unit of money in Albania
luesa common venereal disease caused by the treponema pallidum spirochete; symptoms change through progressive stages; can be congenital (transmitted through the placenta)
kues
leku

usethe act of using
sueFrench writer whose novels described the sordid side of city life (1804-1857)
rueEuropean strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
elklarge northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America
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
lekthe basic unit of money in Albania
els
sel
leuthe basic unit of money in Moldova
ukea small guitar having four strings
kue

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
elangular distance above the horizon (especially of a celestial object)
esa radioactive transuranic element produced by bombarding plutonium with neutrons

SULKER