“UNMERRY” is a valid word. — 12 points Scrabble

merryfull of or showing high-spirited merriment
reruna program that is broadcast again
murry
rumenthe first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewing
murreblack-and-white diving bird of northern seas

menua list of dishes available at a restaurant
runeany character from an ancient Germanic alphabet used in Scandinavia from the 3rd century to the Middle Ages
murr
mure
neum
ruer

menthe force of workers available
runa score in baseball made by a runner touching all four bases safely
yena yearning for something or to do something
rumliquor distilled from fermented molasses
yum
rueEuropean strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
errto make a mistake or be incorrect
urna large vase that usually has a pedestal or feet
ryethe seed of the cereal grass
mun
rema recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
emuany of various systems of units for measuring electricity and magnetism
ernbulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland

mea state in New England
my
um
ema quad with a square body
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
ye
enhalf the width of an em
unan organization of independent states formed in 1945 to promote international peace and security
nea colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts
muthe 12th letter of the Greek alphabet
nuthe 13th letter of the Greek alphabet

UNMERRY