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

booma deep prolonged loud noise
momsinformal terms for a mother
misoa thick paste made from fermented soybeans and barley or rice malt; used in Japanese cooking to make soups or sauces
moosthe sound made by a cow or bull
boosa cry or noise made to express displeasure or contempt
mobsa disorderly crowd of people
bios
momigod of blame and mockery
mibsa unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
obis(West Indies) followers of a religious system involving witchcraft and sorcery

mominformal terms for a mother
booa cry or noise made to express displeasure or contempt
moba disorderly crowd of people
sim
moothe sound made by a cow or bull
soba dyspneic condition
bio
mis
boswild and domestic cattle; in some classifications placed in the subfamily Bovinae or tribe Bovini
mos
obi(West Indies) followers of a religious system involving witchcraft and sorcery
bis
mim
isma belief (or system of beliefs) accepted as authoritative by some group or school
oms
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)
sothe syllable naming the fifth (dominant) note of any musical scale in solmization
mma metric unit of length equal to one thousandth of a meter
bo
moan indefinitely short time
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
om
osa mouth or mouthlike opening

IMBOSOM