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

billsa statute in draft before it becomes law
millsUnited States architect who was the presidentially appointed architect of Washington D.C. (1781-1855)
blissa state of extreme happiness
limbsone of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper
sillsUnited States operatic soprano (born in 1929)
slimstake off weight
limbia border or edge of any of various body parts distinguished by color or structure

missa young woman
billa statute in draft before it becomes law
milla plant consisting of one or more buildings with facilities for manufacturing
slimtake off weight
limbone of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper
sims
sillstructural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
illsan often persistent bodily disorder or disease; a cause for complaining
ibiswading birds of warm regions having long slender down-curved bills
milsa Cypriot monetary unit equal to one thousandth of a pound
libs
ismsa belief (or system of beliefs) accepted as authoritative by some group or school
mibsa unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
sibsa person's brother or sister

illan often persistent bodily disorder or disease; a cause for complaining
sisa female person who has the same parents as another person
sim
mila Cypriot monetary unit equal to one thousandth of a pound
lis
lib
mis
bis
isma belief (or system of beliefs) accepted as authoritative by some group or school
miba unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
siba person's brother or sister

ishave the quality of being; (copula, used with an adjective or a predicate noun)
lia soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
midestruction of heart tissue resulting from obstruction of the blood supply to the heart muscle
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
bia heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals

MISBILLS