“VAILS” is a valid word. — 8 points Scrabble

saila large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel
visaan endorsement made in a passport that allows the bearer to enter the country issuing it
viala small bottle that contains a drug (especially a sealed sterile container for injection by needle)
ailsaromatic bulb used as seasoning
vail
lavsa room or building equipped with one or more toilets
sialthe granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum

las
via
sal
lis
alsthickening of tissue in the motor tracts of the lateral columns and anterior horns of the spinal cord; results in progressive muscle atrophy that starts in the limbs
vasa tube in which a body fluid circulates
vis
ailaromatic bulb used as seasoning
lava room or building equipped with one or more toilets
ais

ishave the quality of being; (copula, used with an adjective or a predicate noun)
asa very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
laa white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
ala silvery ductile metallic element found primarily in bauxite
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
aian agency of the United States Army responsible for providing timely and relevant and accurate and synchronized intelligence to tactical and operational and strategic level commanders

VAILS