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

lastthe temporal end; the concluding time
salta compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
haltthe state of inactivity following an interruption
hatsheaddress that protects the head from bad weather; has shaped crown and usually a brim
hast
lashany of the short curved hairs that grow from the edges of the eyelids
shatgive away information about somebody
latsthe basic unit of money in Latvia
slata thin strip (wood or metal)
latha narrow thin strip of wood used as backing for plaster or to make latticework
altsangular distance above the horizon (especially of a celestial object)

hashave or possess, either in a concrete or an abstract sense
hatheaddress that protects the head from bad weather; has shaped crown and usually a brim
satthe seventh and last day of the week; observed as the Sabbath by Jews and some Christians
ashthe residue that remains when something is burned
las
sal
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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
lata broad flat muscle on either side of the back
altangular distance above the horizon (especially of a celestial object)
tas

ata highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
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
ah
ha(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
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
taa hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
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SHALT