“MUCKWORM” is a valid word. — 21 points Scrabble

workactivity directed toward making or doing something
rocka lump or mass of hard consolidated mineral matter
wormany of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
crowblack birds having a raucous call
mockthe act of mocking or ridiculing
corkouter bark of the cork oak; used for stoppers for bottles etc.
muckany thick, viscous matter
rucka crowd especially of ordinary or undistinguished persons or things
murkan atmosphere in which visibility is reduced because of a cloud of some substance
cormsolid swollen underground bulb-shaped stem or stem base and serving as a reproductive structure

our
mominformal terms for a mother
mumof China
cowfemale of domestic cattle: "`moo-cow' is a child's term"
rowan arrangement of objects or people side by side in a line
rumliquor distilled from fermented molasses
umm
cumthe thick white fluid containing spermatozoa that is ejaculated by the male genital tract
cor
mowa loft in a barn where hay is stored
rom(computer science) memory whose contents can be accessed and read but cannot be changed
mor
rocmythical bird of prey having enormous size and strength
wokpan with a convex bottom; used for frying in Chinese cooking
curan inferior dog or one of mixed breed
orc
koran ancient Hebrew unit of capacity equal to 10 baths or 10 ephahs
cwma steep-walled semicircular basin in a mountain; may contain a lake
moc

MUCKWORM