“CULICIDS” is a valid word. — 13 points Scrabble

lucid(of language) transparently clear; easily understandable
scudi
sulci(anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
discian athletic competition in which a disk-shaped object is thrown as far as possible
ludic

discsound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove
slidmove obliquely or sideways, usually in an uncontrolled manner
lidseither of two folds of skin that can be moved to cover or open the eye
scudthe act of moving along swiftly (as before a gale)
cudsfood of a ruminant regurgitated to be chewed again
sildany of various young herrings (other than brislings) canned as sardines in Norway
duci

lideither of two folds of skin that can be moved to cover or open the eye
ids
disgod of the underworld; counterpart of Greek Pluto
duitwo items of the same kind
lis
sicurge to attack someone
cisan alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
cudfood of a ruminant regurgitated to be chewed again

ishave the quality of being; (copula, used with an adjective or a predicate noun)
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
ida state in the Rocky Mountains
lia soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
sia tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors

CULICIDS